Description: Migrate workers to env-only credentials.
Changes
- Migrate workers to env-only credentials (#2556).
- [IBM i] Incremental load: status, cancel & concurrency guard (#2592) (#2603).
- Trigger a blocking snapshot for source connectors (connector + data model scope) (#2610).
- Worker heartbeat 422: state field carries reason, backend expects bare enum (#2507).
- Do not auto-trigger the credentials test when opening the connector edit modal (#2607).
- Connector edit must not be able to remove whitelist topics (additive only; removal solely via data-model deletion) (#2609).
- Allow changing a pipeline’s target connector (recreates subscriptions) (#2632).
- Source page: backfill on add, fix table delete, restore Subscribe all (#2638).
- Tidy up provisioner (#2637).