Constant MIGRATION_003 

const MIGRATION_003: &str = r#"
-- Recreate user_data table without foreign key constraint on item_id
-- This allows tracking playback progress for items that haven't been synced locally yet

CREATE TABLE IF NOT EXISTS user_data_new (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    user_id TEXT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    item_id TEXT NOT NULL,  -- No foreign key constraint - item may not be synced yet

    -- Playback state
    playback_position_ticks INTEGER DEFAULT 0,
    play_count INTEGER DEFAULT 0,
    is_played INTEGER DEFAULT 0,
    is_favorite INTEGER DEFAULT 0,

    -- Timestamps
    last_played_at TEXT,

    -- Sync status
    synced_at TEXT,
    pending_sync INTEGER DEFAULT 0,  -- 1 if local changes need sync

    UNIQUE(user_id, item_id)
);

-- Copy existing data
INSERT OR IGNORE INTO user_data_new (id, user_id, item_id, playback_position_ticks, play_count, is_played, is_favorite, last_played_at, synced_at, pending_sync)
SELECT id, user_id, item_id, playback_position_ticks, play_count, is_played, is_favorite, last_played_at, synced_at, pending_sync FROM user_data;

-- Drop old table and rename new one
DROP TABLE IF EXISTS user_data;
ALTER TABLE user_data_new RENAME TO user_data;

-- Recreate index
CREATE INDEX IF NOT EXISTS idx_user_data_user ON user_data(user_id);
CREATE INDEX IF NOT EXISTS idx_user_data_item ON user_data(item_id);
"#;

Migration to relax foreign key constraints on user_data table Allows tracking playback progress for items not yet synced to local database