fix: create ProjectionRegistry locally in event delete route

app.state.registry was never set - create ProjectionRegistry()
locally like all other routes do.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/animaltrack/web/routes/events.py

@@ -19,6 +19,7 @@ from animaltrack.events.exceptions import (
 )
 from animaltrack.events.store import EventStore
 from animaltrack.models.reference import UserRole
+from animaltrack.projections import ProjectionRegistry
 from animaltrack.repositories.locations import LocationRepository
 from animaltrack.repositories.user_defaults import UserDefaultsRepository
 from animaltrack.web.templates import render_page
@@ -345,7 +346,7 @@ async def event_delete(request: Request, event_id: str):
 
     # Get event store and registry
     event_store = EventStore(db)
-    registry = request.app.state.registry
+    registry = ProjectionRegistry()
 
     try:
         # Check for dependent events first