Decouple events: use shared.models for all cross-app imports

- Replace all imports from blog.models and cart.models
  with shared.models equivalents
- Convert events/models/calendars.py to re-export stub
- Update shared + glue submodule pointers

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 blog.models.ghost_content import Post
+from shared.models.ghost_content import Post
 
 
 async def add_post_to_entry(

bp/calendars/services/calendars.py

@@ -4,7 +4,7 @@ from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from models.calendars import Calendar
-from blog.models.ghost_content import Post  # for FK existence checks
+from shared.models.ghost_content import Post  # for FK existence checks
 from glue.services.relationships import attach_child, detach_child
 import unicodedata
 import re

bp/markets/routes.py

@@ -5,7 +5,7 @@ from quart import (
 )
 from sqlalchemy import select
 
-from market.models.market_place import MarketPlace
+from shared.models.market_place import MarketPlace
 
 from .services.markets import (
     create_market as svc_create_market,

bp/markets/services/markets.py

@@ -6,8 +6,8 @@ import unicodedata
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
-from market.models.market_place import MarketPlace
-from blog.models.ghost_content import Post
+from shared.models.market_place import MarketPlace
+from shared.models.ghost_content import Post
 from shared.browser.app.utils import utcnow
 from glue.services.relationships import attach_child, detach_child
 

bp/payments/routes.py

@@ -5,7 +5,7 @@ from quart import (
 )
 from sqlalchemy import select
 
-from cart.models.page_config import PageConfig
+from shared.models.page_config import PageConfig
 
 from shared.browser.app.authz import require_admin
 from shared.browser.app.utils.htmx import is_htmx_request