Fix initialization in _AzureSearchSettings to ensure proper inheritance from BaseSettings and DatasourcePayloadConstructor

Author: Kingshuk-Microsoft

src/backend/settings.py

@@ -275,9 +275,11 @@ class _AzureSearchSettings(BaseSettings, DatasourcePayloadConstructor):
     endpoint_suffix: str = Field(default="search.windows.net", exclude=True)
     connection_name: Optional[str] = None
     index: str = Field(serialization_alias="index_name")
+
     def __init__(self, settings: "_AppSettings", **data):
         # Ensure both BaseSettings and DatasourcePayloadConstructor are initialized
         super().__init__(settings=settings, **data)
+
     key: Optional[str] = Field(default=None, exclude=True)
     use_semantic_search: bool = Field(default=False, exclude=True)
     semantic_search_config: str = Field(