Domain isolation: replace cross-domain imports with service calls

Replace direct Post, MarketPlace, Calendar model queries and HTTP API
calls with typed service calls. Events registers all 4 services via
domain_services_fn with has() guards.

Key changes:
- app.py: use domain_services_fn, Post/Calendar/MarketPlace queries
  → services.blog/calendar/market, HTTP cart API → services.cart
- calendars/markets services: Post → services.blog
- post_associations: Post → services.blog, direct queries → services
- markets routes: remove unused MarketPlace import
- glue imports → shared imports throughout

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

bp/calendar_entry/services/post_associations.py

@@ -5,7 +5,7 @@ from sqlalchemy import select
 from sqlalchemy.sql import func
 
 from models.calendars import CalendarEntry, CalendarEntryPost
-from shared.models.ghost_content import Post
+from shared.services.registry import services
 
 
 async def add_post_to_entry(
@@ -28,9 +28,7 @@ async def add_post_to_entry(
         return False, "Calendar entry not found"
 
     # Check if post exists
-    post = await session.scalar(
-        select(Post).where(Post.id == post_id)
-    )
+    post = await services.blog.get_post_by_id(session, post_id)
     if not post:
         return False, "Post not found"
 
@@ -91,20 +89,22 @@ async def remove_post_from_entry(
 async def get_entry_posts(
     session: AsyncSession,
     entry_id: int
-) -> list[Post]:
+) -> list:
     """
-    Get all posts associated with a calendar entry.
+    Get all posts (as PostDTOs) associated with a calendar entry.
     """
     result = await session.execute(
-        select(Post)
-        .join(CalendarEntryPost, (CalendarEntryPost.content_id == Post.id) & (CalendarEntryPost.content_type == "post"))
-        .where(
+        select(CalendarEntryPost.content_id).where(
             CalendarEntryPost.entry_id == entry_id,
-            CalendarEntryPost.deleted_at.is_(None)
+            CalendarEntryPost.content_type == "post",
+            CalendarEntryPost.deleted_at.is_(None),
         )
-        .order_by(Post.title)
     )
-    return list(result.scalars().all())
+    post_ids = list(result.scalars().all())
+    if not post_ids:
+        return []
+    posts = await services.blog.get_posts_by_ids(session, post_ids)
+    return sorted(posts, key=lambda p: (p.title or ""))
 
 
 async def search_posts(
@@ -112,29 +112,10 @@ async def search_posts(
     query: str,
     page: int = 1,
     per_page: int = 10
-) -> tuple[list[Post], int]:
+) -> tuple[list, int]:
     """
     Search for posts by title with pagination.
     If query is empty, returns all posts in published order.
-    Returns (posts, total_count).
+    Returns (post_dtos, total_count).
     """
-    # Build base query
-    if query:
-        # Search by title
-        count_stmt = select(func.count(Post.id)).where(Post.title.ilike(f"%{query}%"))
-        posts_stmt = select(Post).where(Post.title.ilike(f"%{query}%")).order_by(Post.title)
-    else:
-        # All posts in published order (newest first)
-        count_stmt = select(func.count(Post.id))
-        posts_stmt = select(Post).order_by(Post.published_at.desc().nullslast())
-
-    # Count total
-    count_result = await session.execute(count_stmt)
-    total = count_result.scalar() or 0
-
-    # Get paginated results
-    offset = (page - 1) * per_page
-    result = await session.execute(
-        posts_stmt.limit(per_page).offset(offset)
-    )
-    return list(result.scalars().all()), total
+    return await services.blog.search_posts(session, query, page, per_page)