Sync from /srv/compose/unified-media-manager

internal/db/migrations/010_media_release_date.sql

@@ -0,0 +1,7 @@
+-- Add release_date column for calendar view
+ALTER TABLE media ADD COLUMN IF NOT EXISTS release_date TIMESTAMPTZ;
+
+-- Partial index for efficient calendar range queries on monitored, non-deleted items
+CREATE INDEX IF NOT EXISTS idx_media_release_date_monitored
+    ON media (release_date)
+    WHERE release_date IS NOT NULL AND monitored = true AND deleted_at IS NULL;