feat: Promote BigQuery tools to Stable

In preparation to launching GA of the BigQuery agentic tools in ADK, this change marks BIG_QUERY_TOOLSET and BIG_QUERY_TOOL_CONFIG as stable features. The experimental decorators and warnings associated with these features have been removed.

PiperOrigin-RevId: 897865928

Author: google-genai-bot

src/google/adk/features/_feature_registry.py

@@ -99,10 +99,10 @@ class FeatureConfig:
         FeatureStage.EXPERIMENTAL, default_on=True
     ),
     FeatureName.BIG_QUERY_TOOLSET: FeatureConfig(
-        FeatureStage.EXPERIMENTAL, default_on=True
+        FeatureStage.STABLE, default_on=True
     ),
     FeatureName.BIG_QUERY_TOOL_CONFIG: FeatureConfig(
-        FeatureStage.EXPERIMENTAL, default_on=True
+        FeatureStage.STABLE, default_on=True
     ),
     FeatureName.BIGTABLE_TOOL_SETTINGS: FeatureConfig(
         FeatureStage.EXPERIMENTAL, default_on=True

src/google/adk/tools/bigquery/__init__.py

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-"""BigQuery Tools (Experimental).
+"""BigQuery Tools.
 
 BigQuery Tools under this module are hand crafted and customized while the tools
 under google.adk.tools.google_api_tool are auto generated based on API

src/google/adk/tools/bigquery/bigquery_credentials.py

@@ -14,7 +14,6 @@
 
 from __future__ import annotations
 
-from ...features import experimental
 from ...features import FeatureName
 from .._google_credentials import BaseGoogleCredentialsConfig
 
@@ -26,9 +25,8 @@
 BIGQUERY_DEFAULT_SCOPE = ["https://www.googleapis.com/auth/bigquery"]
 
 
-@experimental(FeatureName.GOOGLE_CREDENTIALS_CONFIG)
 class BigQueryCredentialsConfig(BaseGoogleCredentialsConfig):
-  """BigQuery Credentials Configuration for Google API tools (Experimental).
+  """BigQuery Credentials Configuration for Google API tools.
 
   Please do not use this in production, as it may be deprecated later.
   """

src/google/adk/tools/bigquery/bigquery_toolset.py

@@ -25,7 +25,6 @@
 from . import metadata_tool
 from . import query_tool
 from . import search_tool
-from ...features import experimental
 from ...features import FeatureName
 from ...tools.base_tool import BaseTool
 from ...tools.base_toolset import BaseToolset
@@ -35,7 +34,6 @@
 from .config import BigQueryToolConfig
 
 
-@experimental(FeatureName.BIG_QUERY_TOOLSET)
 class BigQueryToolset(BaseToolset):
   """BigQuery Toolset contains tools for interacting with BigQuery data and metadata."""
 

src/google/adk/tools/bigquery/config.py

@@ -21,7 +21,6 @@
 from pydantic import ConfigDict
 from pydantic import field_validator
 
-from ...features import experimental
 from ...features import FeatureName
 
 
@@ -48,7 +47,6 @@ class WriteMode(Enum):
   """All write operations are allowed."""
 
 
-@experimental(FeatureName.BIG_QUERY_TOOL_CONFIG)
 class BigQueryToolConfig(BaseModel):
   """Configuration for BigQuery tools."""
 

tests/unittests/tools/bigquery/test_bigquery_tool_config.py

@@ -27,14 +27,6 @@ def reset_warned_features():
   _WARNED_FEATURES.clear()
 
 
-def test_bigquery_tool_config_experimental_warning():
-  """Test BigQueryToolConfig experimental warning."""
-  with warnings.catch_warnings(record=True) as w:
-    BigQueryToolConfig()
-    assert len(w) == 1
-    assert "BIG_QUERY_TOOL_CONFIG is enabled." in str(w[0].message)
-
-
 def test_bigquery_tool_config_invalid_property():
   """Test BigQueryToolConfig raises exception when setting invalid property."""
   with pytest.raises(