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>

blog/bp/post/routes.py

@@ -11,8 +11,8 @@ from quart import (
     request,
 )
 from .services.post_data import post_data
-from .services.post_operations import toggle_post_like
 from shared.infrastructure.data_client import fetch_data
+from shared.infrastructure.actions import call_action
 from shared.contracts.dtos import CartSummaryDTO, dto_from_dict
 from shared.infrastructure.fragments import fetch_fragment, fetch_fragments
 
@@ -144,11 +144,10 @@ def register():
       post_id = g.post_data["post"]["id"]
       user_id = g.user.id
 
-      liked, error = await toggle_post_like(g.s, user_id, post_id)
-
-      if error:
-          resp = make_response(error, 404)
-          return resp
+      result = await call_action("likes", "toggle", payload={
+          "user_id": user_id, "target_type": "post", "target_id": post_id,
+      })
+      liked = result["liked"]
 
       html = await render_template(
           "_types/browse/like/button.html",