POSTGRES_XMIN_HANDOFF_ROUTE_UNSUPPORTED

The explicit XMin initial/incremental handoff is certified only for a PostgreSQL source and an MSSQL sink. dpone check rejected another endpoint pair before connector I/O.

Use:

source:
  type: postgres
  options:
    incremental_strategy: xmin
    xmin_execution: {mode: initial, handoff_id: orders_v1}
sink:
  type: mssql

For another route, omit xmin_execution and select a strategy that is explicitly supported by that source/sink capability contract. Do not spoof endpoint names to pass validation.

See PostgreSQL to MSSQL.