Added support for Journey-level order guarantees

Quickwork now supports enforcing order guarantees at the journey level, ensuring that transactions are processed sequentially with full idempotency. This means requests—whether received via polling or webhooks—will be executed in the exact order they arrive.

While order guarantees can be enabled for API services as well, this is not recommended, as it may delay independent API calls that don’t depend on each other.

Once enabled, metrics related to the wait queue will automatically appear in the monitoring section, providing better visibility into ordered execution performance.