CREATE INDEX IF NOT EXISTS idx_audit_media_id ON audit_log(media_id);
CREATE INDEX IF NOT EXISTS idx_audit_timestamp ON audit_log(timestamp);
CREATE INDEX IF NOT EXISTS idx_audit_action ON audit_log(action);
CREATE INDEX IF NOT EXISTS idx_media_content_hash ON media_items(content_hash);
CREATE INDEX IF NOT EXISTS idx_media_media_type ON media_items(media_type);
CREATE INDEX IF NOT EXISTS idx_media_created_at ON media_items(created_at);