Add resumable bulk lyrics operations

server/db.js

@@ -258,6 +258,13 @@ export async function initDb() {
     CREATE INDEX IF NOT EXISTS idx_flags_video  ON lyric_flags (video_id, status);
     CREATE INDEX IF NOT EXISTS idx_flags_status ON lyric_flags (status, created_at DESC);
 
+    CREATE TABLE IF NOT EXISTS admin_lyrics_jobs (
+      id TEXT PRIMARY KEY, action TEXT NOT NULL, status TEXT NOT NULL DEFAULT 'queued',
+      ids TEXT NOT NULL, state TEXT NOT NULL DEFAULT '{}', error TEXT,
+      created_at INTEGER NOT NULL DEFAULT (unixepoch()), updated_at INTEGER NOT NULL DEFAULT (unixepoch())
+    );
+    CREATE INDEX IF NOT EXISTS idx_admin_lyrics_jobs ON admin_lyrics_jobs(status,created_at);
+
     -- API tokens for scripts (lyrics injection etc.). Only a SHA-256 of the
     -- token is stored; the plaintext is shown once when it is created.
     CREATE TABLE IF NOT EXISTS api_tokens (