Add attach/detach glue calls to menu items, markets, and page config CRUD

Wire up ContainerRelation tracking via attach_child/detach_child in:
- menu_items: create, update (re-link on post change), delete
- markets: create (including revive), soft_delete
- page config: creation in update_features and update_sumup routes

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

bp/post/admin/routes.py

@@ -82,6 +82,8 @@ def register():
         pc = PageConfig(container_type="page", container_id=post_id, features={})
         g.s.add(pc)
         await g.s.flush()
+        from glue.services.relationships import attach_child
+        await attach_child(g.s, "page", post_id, "page_config", pc.id)
 
     # Parse request body
     body = await request.get_json()
@@ -144,6 +146,8 @@ def register():
         pc = PageConfig(container_type="page", container_id=post_id, features={})
         g.s.add(pc)
         await g.s.flush()
+        from glue.services.relationships import attach_child
+        await attach_child(g.s, "page", post_id, "page_config", pc.id)
 
     form = await request.form
     merchant_code = (form.get("merchant_code") or "").strip()

bp/post/services/markets.py

@@ -10,6 +10,7 @@ from market.models.market_place import MarketPlace
 from models.ghost_content import Post
 from cart.models.page_config import PageConfig
 from shared.browser.app.utils import utcnow
+from glue.services.relationships import attach_child, detach_child
 
 
 class MarketError(ValueError):
@@ -58,12 +59,14 @@ async def create_market(sess: AsyncSession, post_id: int, name: str) -> MarketPl
             existing.deleted_at = None  # revive
             existing.name = name
             await sess.flush()
+            await attach_child(sess, "page", post_id, "market", existing.id)
             return existing
         raise MarketError(f'Market with slug "{slug}" already exists for this page.')
 
     market = MarketPlace(container_type="page", container_id=post_id, name=name, slug=slug)
     sess.add(market)
     await sess.flush()
+    await attach_child(sess, "page", post_id, "market", market.id)
     return market
 
 
@@ -86,4 +89,5 @@ async def soft_delete_market(sess: AsyncSession, post_slug: str, market_slug: st
 
     market.deleted_at = utcnow()
     await sess.flush()
+    await detach_child(sess, "page", market.container_id, "market", market.id)
     return True