Replace inter-service _handlers dicts with declarative sx defquery/defaction

The inter-service data layer (fetch_data/call_action) was the least
structured part of the codebase — Python _handlers dicts with ad-hoc
param extraction scattered across 16 route files. This replaces them
with declarative .sx query/action definitions that make the entire
inter-service protocol self-describing and greppable.

Infrastructure:
- defquery/defaction special forms in the sx evaluator
- Query/action registry with load, lookup, and schema introspection
- Query executor using async_eval with I/O primitives
- Blueprint factories (create_data_blueprint/create_action_blueprint)
  with sx-first dispatch and Python fallback
- /internal/schema endpoint on every service
- parse-datetime and split-ids primitives for type coercion

Service extractions:
- LikesService (toggle, is_liked, liked_slugs, liked_ids)
- PageConfigService (ensure, get_by_container, get_by_id, get_batch, update)
- RelationsService (wraps module-level functions)
- AccountDataService (user_by_email, newsletters)
- CartItemsService, MarketDataService (raw SQLAlchemy lookups)

50 of 54 handlers converted to sx, 4 Python fallbacks remain
(ghost-sync/push-member, clear-cart-for-order, create-order).
Net: -1,383 lines Python, +251 lines modified.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

market/actions.sx

@@ -0,0 +1,15 @@
+;; Market service — inter-service action endpoints
+
+(defaction create-marketplace (&key container-type container-id name slug)
+  "Create a new marketplace within a container."
+  (let ((mp (service "market" "create-marketplace"
+              :container-type container-type :container-id container-id
+              :name name :slug slug)))
+    mp))
+
+(defaction soft-delete-marketplace (&key container-type container-id slug)
+  "Soft-delete a marketplace by slug within a container."
+  (let ((deleted (service "market" "soft-delete-marketplace"
+                   :container-type container-type :container-id container-id
+                   :slug slug)))
+    {"deleted" deleted}))

market/bp/actions/routes.py

@@ -1,74 +1,14 @@
 """Market app action endpoints.
 
-Exposes write operations at ``/internal/actions/<action_name>`` for
-cross-app callers (blog, events) via the internal action client.
+All actions are defined in ``market/actions.sx``.
 """
 from __future__ import annotations
 
-from quart import Blueprint, g, jsonify, request
+from quart import Blueprint
 
-from shared.infrastructure.actions import ACTION_HEADER
-from shared.services.registry import services
+from shared.infrastructure.query_blueprint import create_action_blueprint
 
 
 def register() -> Blueprint:
-    bp = Blueprint("actions", __name__, url_prefix="/internal/actions")
-
-    @bp.before_request
-    async def _require_action_header():
-        if not request.headers.get(ACTION_HEADER):
-            return jsonify({"error": "forbidden"}), 403
-        from shared.infrastructure.internal_auth import validate_internal_request
-        if not validate_internal_request():
-            return jsonify({"error": "forbidden"}), 403
-
-    _handlers: dict[str, object] = {}
-
-    @bp.post("/<action_name>")
-    async def handle_action(action_name: str):
-        handler = _handlers.get(action_name)
-        if handler is None:
-            return jsonify({"error": "unknown action"}), 404
-        try:
-            result = await handler()
-            return jsonify(result)
-        except Exception as exc:
-            import logging
-            logging.getLogger(__name__).exception("Action %s failed", action_name)
-            return jsonify({"error": str(exc)}), 500
-
-    # --- create-marketplace ---
-    async def _create_marketplace():
-        data = await request.get_json()
-        mp = await services.market.create_marketplace(
-            g.s,
-            data["container_type"],
-            data["container_id"],
-            data["name"],
-            data["slug"],
-        )
-        return {
-            "id": mp.id,
-            "container_type": mp.container_type,
-            "container_id": mp.container_id,
-            "name": mp.name,
-            "slug": mp.slug,
-            "description": mp.description,
-        }
-
-    _handlers["create-marketplace"] = _create_marketplace
-
-    # --- soft-delete-marketplace ---
-    async def _soft_delete_marketplace():
-        data = await request.get_json()
-        deleted = await services.market.soft_delete_marketplace(
-            g.s,
-            data["container_type"],
-            data["container_id"],
-            data["slug"],
-        )
-        return {"deleted": deleted}
-
-    _handlers["soft-delete-marketplace"] = _soft_delete_marketplace
-
+    bp, _handlers = create_action_blueprint("market")
     return bp

market/bp/data/routes.py

@@ -1,110 +1,14 @@
 """Market app data endpoints.
 
-Exposes read-only JSON queries at ``/internal/data/<query_name>`` for
-cross-app callers via the internal data client.
+All queries are defined in ``market/queries.sx``.
 """
 from __future__ import annotations
 
-from quart import Blueprint, g, jsonify, request
+from quart import Blueprint
 
-from shared.infrastructure.data_client import DATA_HEADER
-from shared.contracts.dtos import dto_to_dict
-from shared.services.registry import services
+from shared.infrastructure.query_blueprint import create_data_blueprint
 
 
 def register() -> Blueprint:
-    bp = Blueprint("data", __name__, url_prefix="/internal/data")
-
-    @bp.before_request
-    async def _require_data_header():
-        if not request.headers.get(DATA_HEADER):
-            return jsonify({"error": "forbidden"}), 403
-        from shared.infrastructure.internal_auth import validate_internal_request
-        if not validate_internal_request():
-            return jsonify({"error": "forbidden"}), 403
-
-    _handlers: dict[str, object] = {}
-
-    @bp.get("/<query_name>")
-    async def handle_query(query_name: str):
-        handler = _handlers.get(query_name)
-        if handler is None:
-            return jsonify({"error": "unknown query"}), 404
-        result = await handler()
-        return jsonify(result)
-
-    # --- marketplaces-for-container ---
-    async def _marketplaces_for_container():
-        container_type = request.args.get("type", "")
-        container_id = request.args.get("id", type=int)
-        markets = await services.market.marketplaces_for_container(
-            g.s, container_type, container_id,
-        )
-        return [dto_to_dict(m) for m in markets]
-
-    _handlers["marketplaces-for-container"] = _marketplaces_for_container
-
-    # --- products-by-ids ---
-    async def _products_by_ids():
-        """Return product details for a list of IDs (comma-separated)."""
-        from sqlalchemy import select
-        from shared.models.market import Product
-
-        ids_raw = request.args.get("ids", "")
-        try:
-            ids = [int(x) for x in ids_raw.split(",") if x.strip()]
-        except ValueError:
-            return {"error": "ids must be comma-separated integers"}, 400
-        if not ids:
-            return []
-
-        rows = (await g.s.execute(
-            select(Product).where(Product.id.in_(ids))
-        )).scalars().all()
-
-        return [
-            {
-                "id": p.id,
-                "title": p.title,
-                "slug": p.slug,
-                "image": p.image,
-                "regular_price": str(p.regular_price) if p.regular_price is not None else None,
-                "special_price": str(p.special_price) if p.special_price is not None else None,
-            }
-            for p in rows
-        ]
-
-    _handlers["products-by-ids"] = _products_by_ids
-
-    # --- marketplaces-by-ids ---
-    async def _marketplaces_by_ids():
-        """Return marketplace data for a list of IDs (comma-separated)."""
-        from sqlalchemy import select
-        from shared.models.market_place import MarketPlace
-
-        ids_raw = request.args.get("ids", "")
-        try:
-            ids = [int(x) for x in ids_raw.split(",") if x.strip()]
-        except ValueError:
-            return {"error": "ids must be comma-separated integers"}, 400
-        if not ids:
-            return []
-
-        rows = (await g.s.execute(
-            select(MarketPlace).where(MarketPlace.id.in_(ids))
-        )).scalars().all()
-
-        return [
-            {
-                "id": m.id,
-                "name": m.name,
-                "slug": m.slug,
-                "container_type": m.container_type,
-                "container_id": m.container_id,
-            }
-            for m in rows
-        ]
-
-    _handlers["marketplaces-by-ids"] = _marketplaces_by_ids
-
+    bp, _handlers = create_data_blueprint("market")
     return bp

market/queries.sx

@@ -0,0 +1,14 @@
+;; Market service — inter-service data queries
+
+(defquery marketplaces-for-container (&key type id)
+  "Marketplaces attached to a container (page, etc)."
+  (service "market" "marketplaces-for-container"
+    :container-type type :container-id id))
+
+(defquery products-by-ids (&key ids)
+  "Return product details for comma-separated IDs."
+  (service "market-data" "products-by-ids" :ids (split-ids ids)))
+
+(defquery marketplaces-by-ids (&key ids)
+  "Return marketplace data for comma-separated IDs."
+  (service "market-data" "marketplaces-by-ids" :ids (split-ids ids)))

market/services/__init__.py

@@ -14,6 +14,9 @@ def register_domain_services() -> None:
 
     services.market = SqlMarketService()
 
+    from shared.services.market_data_impl import SqlMarketDataService
+    services.register("market_data", SqlMarketDataService())
+
     # Federation needed for AP shared infrastructure (activitypub blueprint)
     if not services.has("federation"):
         from shared.services.federation_impl import SqlFederationService