/**
 * Idempotent. Patches `pg.Pool.prototype.connect` to stamp the caller's stack
 * onto each leased client. No-op unless `DREAM_DB_LEAK_DIAGNOSTICS` is set.
 */
export declare function installDbConnectionLeakDiagnosticsIfEnabled(): void;
/**
 * If diagnostics are enabled, log the acquire stack of every client still
 * checked out. Called from the shutdown-drain timeout path.
 */
export declare function reportLeakedDbConnections(label: string): void;