feat: add recently played and scrobble flow

internal/db/migrations/0003_play_history.sql

@@ -0,0 +1,12 @@
+CREATE TABLE IF NOT EXISTS play_history (
+  id TEXT PRIMARY KEY,
+  user_id TEXT NOT NULL,
+  track_id TEXT NOT NULL,
+  event_type TEXT NOT NULL,
+  played_at TEXT NOT NULL,
+  client_name TEXT,
+  submission INTEGER NOT NULL DEFAULT 0
+);
+
+CREATE INDEX IF NOT EXISTS idx_play_history_user_played_at ON play_history(user_id, played_at DESC);
+CREATE INDEX IF NOT EXISTS idx_play_history_track_played_at ON play_history(track_id, played_at DESC);