/**
 * Resolve a writable path for a file-based SQLite database, returning the path
 * to actually open.
 *
 * On a read-only filesystem (read-only Docker container, serverless bundle) the
 * configured directory cannot be written. Rather than crash every request, fall
 * back to a temp dir so runtime indexing keeps working. The fallback is
 * namespaced by a hash of the absolute configured path so unrelated apps sharing
 * the OS temp dir do not open the same SQLite file (the tables are package-global
 * and not namespaced per site). The fallback database is ephemeral and reseeded
 * from the prerendered dump / sitemap on cold start, so this is a safe
 * degradation for the SSR indexing model.
 */
export declare function resolveWritableDbPath(dbPath: string): Promise<string>;