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The wizard's connection check ran on the API server through two endpoints added
for it. That server is a different machine with a different identity, so the
answer was about the API server rather than about the worker that will run the
queries: a host reachable from one is not necessarily reachable from the other,
and IAM RDS and Azure workload identity authenticate as whichever process opens
the connection.
Run the privilege query as a preview job instead. A job goes through the
worker's Postgres executor, which is where `PgAuthMode::of` already picks the
authentication mode, and it takes either a resource value or a `$res:` path
exactly as a Postgres step does. Postgres composes the suggested GRANT
statements through `format('%I')`, so identifier quoting stays where it is
already implemented.
Removes `test_datatable_resource_connection` and
`test_datatable_connection_value`, and `connect_as_the_worker_would` with them.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>