Split cart into 4 microservices: relations, likes, orders, page-config→blog

Phase 1 - Relations service (internal): owns ContainerRelation, exposes
get-children data + attach/detach-child actions. Retargeted events, blog,
market callers from cart to relations.

Phase 2 - Likes service (internal): unified Like model replaces ProductLike
and PostLike with generic target_type/target_slug/target_id. Exposes
is-liked, liked-slugs, liked-ids data + toggle action.

Phase 3 - PageConfig → blog: moved ownership to blog with direct DB queries,
removed proxy endpoints from cart.

Phase 4 - Orders service (public): owns Order/OrderItem + SumUp checkout
flow. Cart checkout now delegates to orders via create-order action.
Webhook/return routes and reconciliation moved to orders.

Phase 5 - Infrastructure: docker-compose, deploy.sh, Dockerfiles updated
for all 3 new services. Added orders_url helper and factory model imports.

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

market/bp/product/routes.py

@@ -10,7 +10,7 @@ from quart import (
 )
 from sqlalchemy import select, func, update
 
-from models.market import Product, ProductLike
+from models.market import Product
 from ..browse.services.slugs import canonical_html_slug
 from ..browse.services.blacklist.product import is_product_blocked
 from ..browse.services import db_backend as cb
@@ -18,7 +18,8 @@ from ..browse.services import _massage_product
 from shared.utils import host_url
 from shared.browser.app.redis_cacher import cache_page, clear_cache
 from ..cart.services import total
-from .services.product_operations import toggle_product_like, massage_full_product
+from shared.infrastructure.actions import call_action
+from .services.product_operations import massage_full_product
 
 
 def register():
@@ -132,11 +133,10 @@ def register():
 
       user_id = g.user.id
 
-      liked, error = await toggle_product_like(g.s, user_id, product_slug)
-
-      if error:
-          resp = make_response(error, 404)
-          return resp
+      result = await call_action("likes", "toggle", payload={
+          "user_id": user_id, "target_type": "product", "target_slug": product_slug,
+      })
+      liked = result["liked"]
 
       html = await render_template(
           "_types/browse/like/button.html",