feat: add task type hierarchy with subtypes (issue/meeting/support/maintenance/research/review/story/test)

app/main.py

@@ -51,6 +51,7 @@ def startup():
     from app.core.config import Base, engine, SessionLocal
     from app.models import webhook, apikey, activity, milestone, notification, worklog, monitor
     Base.metadata.create_all(bind=engine)
+    _migrate_schema()
 
     # Initialize from AbstractWizard (admin user, default project, etc.)
     from app.init_wizard import run_init