ai: apply changes for #919 (1 review thread)

Addresses:
  - #3828445075 at src/databricks/sql/backend/kernel/auth_bridge.py:285

Signed-off-by: peco-engineer-bot[bot] <peco-engineer-bot[bot]@users.noreply.github.com>

Author: peco-engineer-bot[bot]

src/databricks/sql/backend/kernel/auth_bridge.py

@@ -282,7 +282,7 @@ def kernel_auth_kwargs(
             if opts.get(name) is not None
         ]
         if ignored_signals:
-            logger.debug(
+            logger.warning(
                 "auth_type='azure-sp-m2m' selected; ignoring conflicting "
                 "credential signal(s) %s (Azure SP credentials in the azure_* "
                 "namespace take precedence on the kernel path).",

tests/unit/test_kernel_auth_bridge.py

@@ -748,7 +748,7 @@ def test_azure_sp_m2m_ignores_conflicting_oauth_signal(self, conflicting_signal)
         # signal as a hard "Ambiguous auth" error, but an explicit azure-sp-m2m
         # selector carries its creds in the azure_* namespace, so a stray
         # oauth_*/credentials_provider value is NOT a routing collision — it is
-        # silently ignored (logger.debug breadcrumb only) and the Azure SP flow
+        # silently ignored (logger.warning breadcrumb only) and the Azure SP flow
         # still wins. This guards against a refactor accidentally promoting the
         # ignored signal to an error (see the routing note in auth_bridge.py).
         opts = dict(self._CREDS, **conflicting_signal)