chore(deps): bump databricks-sql-connector to 4.2.7 and restore patch-level ceiling

CHANGELOG.md

@@ -20,6 +20,7 @@
 - Raise the `dbt-tests-adapter` test-dependency floor to `>=1.20.0` to pick up its `persist_docs` fixture typo fix (test-only, no runtime impact) ([#1490](https://github.com/databricks/dbt-databricks/pull/1490))
 - Defer SDK `Config` construction to connection-open time so offline paths (`dbt parse`/`list`/`compile`) don't trigger the host-metadata probe introduced in `databricks-sdk>=0.103`; as a side effect, auth errors now surface at first connection rather than during profile parsing. ([#1474](https://github.com/databricks/dbt-databricks/pull/1474))
 - Bump ceilings on `databricks-sdk` (now `<0.105.0`) and `databricks-sql-connector[pyarrow]` (now `<4.3.0`) to admit newer releases; floors unchanged. ([#1474](https://github.com/databricks/dbt-databricks/pull/1474))
+- Bump `databricks-sql-connector` to 4.2.7 and tighten its ceiling back to patch level (`<4.3.0` → `<4.2.8`), so future patch releases require an intentional bump rather than being admitted silently. ([#1497](https://github.com/databricks/dbt-databricks/pull/1497))
 - Stabilize the `TestChangingSchema*` Python-model functional tests under min-deps (dbt-core 1.11.2), where a sibling class's source schema.yml could leak into their parse and fail with `EnvVarMissingError`. ([#1488](https://github.com/databricks/dbt-databricks/pull/1488))
 - **BREAKING:** users who relied on column-level constraints (NOT NULL, primary key, foreign key, check) being applied under `use_materialization_v2: true` without `contract.enforced: true` must now set `contract.enforced: true` explicitly on the model.
 

pyproject.toml

@@ -24,7 +24,7 @@ classifiers = [
 dependencies = [
     "click>=8.2.0, <9.0.0",
     "databricks-sdk>=0.68.0, <0.105.0",
-    "databricks-sql-connector[pyarrow]>=4.1.1, <4.3.0",
+    "databricks-sql-connector[pyarrow]>=4.1.1, <4.2.8",
     "dbt-adapters>=1.22.0, <1.23.0",
     "dbt-common>=1.37.0, <1.38.0",
     "dbt-core>=1.11.2, <1.11.9",