feat: decouple events from shared_lib, add app-owned models

Phase 1-3 of decoupling:
- path_setup.py adds project root to sys.path
- Events-owned models in events/models/ (calendars with all related models)
- All imports updated: shared.infrastructure, shared.db, shared.browser, etc.
- Calendar uses container_type/container_id instead of post_id FK
- CalendarEntryPost uses content_type/content_id (generic content refs)

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

bp/calendar/admin/routes.py

@@ -5,8 +5,8 @@ from quart import (
 )
 
 
-from suma_browser.app.authz import require_admin
-from suma_browser.app.redis_cacher import clear_cache
+from shared.browser.app.authz import require_admin
+from shared.browser.app.redis_cacher import clear_cache
 
 
 
@@ -17,7 +17,7 @@ def register():
     @bp.get("/")
     @require_admin
     async def admin(calendar_slug: str, **kwargs):
-        from suma_browser.app.utils.htmx import is_htmx_request
+        from shared.browser.app.utils.htmx import is_htmx_request
 
         # Determine which template to use based on request type
         if not is_htmx_request():

bp/calendar/routes.py

@@ -11,7 +11,7 @@ from sqlalchemy import select
 from models.calendars import Calendar
 
 from sqlalchemy.orm import selectinload,  with_loader_criteria
-from suma_browser.app.authz import require_admin
+from shared.browser.app.authz import require_admin
 
 from .admin.routes import register as register_admin
 from .services import get_visible_entries_for_period
@@ -23,17 +23,17 @@ from .services.calendar_view import (
     get_calendar_by_slug,
     update_calendar_description,
 )
-from suma_browser.app.utils.htmx import is_htmx_request
+from shared.browser.app.utils.htmx import is_htmx_request
 
 from ..slots.routes import register as register_slots
 
 from models.calendars import CalendarSlot
 
-from suma_browser.app.bp.calendars.services.calendars import soft_delete
+from bp.calendars.services.calendars import soft_delete
 
-from suma_browser.app.bp.day.routes import register as register_day
+from bp.day.routes import register as register_day
 
-from suma_browser.app.redis_cacher import cache_page, clear_cache
+from shared.browser.app.redis_cacher import cache_page, clear_cache
 
 from sqlalchemy import select
 
@@ -213,7 +213,7 @@ def register():
     @require_admin
     @clear_cache(tag="calendars", tag_scope="all")
     async def delete(calendar_slug: str, **kwargs):
-        from suma_browser.app.utils.htmx import is_htmx_request
+        from shared.browser.app.utils.htmx import is_htmx_request
 
         cal = g.calendar
         cal.deleted_at = datetime.now(timezone.utc)
@@ -230,7 +230,7 @@ def register():
             cals = (
                 await g.s.execute(
                     select(Calendar)
-                    .where(Calendar.post_id == post_id, Calendar.deleted_at.is_(None))
+                    .where(Calendar.container_type == "page", Calendar.container_id == post_id, Calendar.deleted_at.is_(None))
                     .order_by(Calendar.name.asc())
                 )
             ).scalars().all()

bp/calendar/services/adopt_session_entries_for_user.py

@@ -1,5 +1,6 @@
 from sqlalchemy import select, update
 from models.calendars import CalendarEntry
+
 from sqlalchemy import func
 
 async def adopt_session_entries_for_user(session, user_id: int, session_id: str | None) -> None:

bp/calendar/services/calendar_view.py

@@ -11,7 +11,6 @@ from sqlalchemy.orm import selectinload, with_loader_criteria
 
 from models.calendars import Calendar, CalendarSlot
 
-
 def parse_int_arg(name: str, default: Optional[int] = None) -> Optional[int]:
     """Parse an integer query parameter from the request."""
     val = request.args.get(name, "").strip()
@@ -71,7 +70,8 @@ async def get_calendar_by_post_and_slug(
             with_loader_criteria(CalendarSlot, CalendarSlot.deleted_at.is_(None)),
         )
         .where(
-            Calendar.post_id == post_id,
+            Calendar.container_type == "page",
+            Calendar.container_id == post_id,
             Calendar.slug == calendar_slug,
             Calendar.deleted_at.is_(None),
         )

bp/calendar/services/slots.py

@@ -8,6 +8,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 
 from models.calendars import CalendarSlot
 
+
 class SlotError(ValueError):
     pass
 

bp/calendar/services/visiblity.py

@@ -10,6 +10,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 from models.calendars import CalendarEntry
 
 
+
 @dataclass
 class VisibleEntries:
     """