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

internal/db/migrations/012_subtitle_cache.sql

@@ -0,0 +1,14 @@
+-- Subtitle cache table to avoid filesystem glob on every detail request
+CREATE TABLE IF NOT EXISTS media_subtitles (
+    id BIGSERIAL PRIMARY KEY,
+    media_file_id BIGINT NOT NULL REFERENCES media_files(id) ON DELETE CASCADE,
+    file_name TEXT NOT NULL,
+    language TEXT NOT NULL,
+    language_code TEXT NOT NULL,
+    hi BOOLEAN NOT NULL DEFAULT false,
+    forced BOOLEAN NOT NULL DEFAULT false,
+    source TEXT NOT NULL DEFAULT 'downloaded',
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+CREATE INDEX IF NOT EXISTS idx_media_subtitles_file ON media_subtitles (media_file_id);