E2E sub-agent finding: instance configured with `data_source.type='bigquery'`
and no `data_source.keboola.*` block. Admin POSTs `{source_type: 'keboola'}`
to /api/admin/register-table → returns 201, row lands in the registry, but
never syncs because the scheduler has no Keboola URL/token to ATTACH
against. Operator only notices the gap when `da catalog` keeps showing
nothing.
The new `_validate_source_type_configured` helper runs immediately after
the id/view-name collision checks in `register_table`. A source_type is
considered configured when:
- it matches `get_data_source_type()` (the instance's primary), OR
- a non-empty `data_source.<source_type>` block exists in the effective
`instance.yaml` (multi-source instance), OR
- it's in `_SOURCE_TYPES_INDEPENDENT_OF_DATA_SOURCE` (Jira / local — both
get data through paths that don't involve `data_source.*`).
Returns 422 with a message that names the configured primary source and
points at `/admin/server-config` for enabling a secondary one. None /
empty source_type is still tolerated for backward compat with legacy CLI
scripts that don't set the field — the route resolves it later.
5 new tests cover: keboola-on-bq rejected, bq-on-keboola rejected,
matching source_type still works, jira allowed regardless, omitted
source_type passes through.
Existing tests that registered Keboola rows on the unconfigured default
test instance now opt into a `keboola_instance` fixture to satisfy the
new validator (tests/test_admin_bq_register.py + .keboola_materialized
+ .unregister_cleanup; the multi-source PUT test in test_admin_bq_register
adds a `keboola` block to its synthetic config).
Pre-existing test_missing_project_returns_error failure in
TestRebuildFromRegistry is unrelated (config-cache leakage from a
previous test in the same class) — confirmed pre-existing on the prior
commit via `git stash` reproduction.
bc3ba0d43d