- AW-1: Add composite index on calendar_members(user_id, status) for the
hot shared-calendar polling query
- AS-6: Add composite index on ntfy_sent(user_id, sent_at) for dedup lookups
- AW-5: Combine get_user_permission into single LEFT JOIN query instead of
2 sequential queries (called twice per event edit)
- AC-5: Batch cascade_on_disconnect — single GROUP BY + bulk UPDATE instead
of N per-calendar checks when a connection is severed
- AW-6: Collapse admin dashboard 5 COUNT queries into single conditional
aggregation using COUNT().filter()
- AC-3: Cache get_current_settings in request.state to avoid redundant
queries when multiple dependencies need settings in the same request
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
