[ 'pending' => 'proofdb:ai:metadata:pending', 'delayed' => 'proofdb:ai:metadata:delayed', 'failed' => 'proofdb:ai:metadata:failed', 'retry_prefix' => 'proofdb:ai:metadata:retry:', 'error_prefix' => 'proofdb:ai:metadata:error:', 'max_retries' => (int) (getenv('AI_METADATA_QUEUE_MAX_RETRIES') ?: 5), 'base_delay_seconds' => (int) (getenv('AI_METADATA_QUEUE_BASE_DELAY_SECONDS') ?: 60), 'block_timeout' => (int) (getenv('AI_METADATA_QUEUE_BLOCK_TIMEOUT') ?: 5), ], ];