Review (maestro #510): batch and CDC tables are both removed through
DELETE /pipeline/{id}/jobs (the platform dispatches by type: Airflow refresh
vs Kafka Connect reconfigure), so the connector 'if' in the controller is
gone. deleteTable/deleteTables/addTable are now thin controller methods over
PipelineTablesService (mark -> resolve jobs -> platform -> rollback), with
typed request bodies.
Behavior change for batch: the platform refuses to remove the LAST table of
a pipeline (400 'Cannot remove all jobs'), where DELETE /jobs/{id} allowed it.
Co-Authored-By: WOZCODE <contact@withwoz.com>
