Fix DatabricksSqlHook sqlalchemy_url missing http_path from connection extra

providers/databricks/src/airflow/providers/databricks/hooks/databricks_sql.py

@@ -184,15 +184,30 @@ def _get_sql_endpoint_by_name(self, endpoint_name) -> dict[str, Any]:
         else:
             return endpoint
 
+    def _resolve_http_path(self, allow_endpoint_lookup: bool = True) -> str | None:
+        """
+        Resolve http_path from explicit arg, connection extra, or endpoint name.
+
+        :param allow_endpoint_lookup: If True, may call API to resolve sql_endpoint_name.
+            Set False for offline-safe paths like sqlalchemy_url.
+        :return: resolved http_path or None if not found.
+        """
+        if self._http_path:
+            return self._http_path
+        if "http_path" in self.databricks_conn.extra_dejson:
+            self._http_path = self.databricks_conn.extra_dejson["http_path"]
+            return self._http_path
+        if allow_endpoint_lookup and self._sql_endpoint_name:
+            endpoint = self._get_sql_endpoint_by_name(self._sql_endpoint_name)
+            self._http_path = endpoint["odbc_params"]["path"]
+            return self._http_path
+        return self._http_path
+
     def get_conn(self) -> AirflowConnection:
         """Return a Databricks SQL connection object."""
         if not self._http_path:
-            if self._sql_endpoint_name:
-                endpoint = self._get_sql_endpoint_by_name(self._sql_endpoint_name)
-                self._http_path = endpoint["odbc_params"]["path"]
-            elif "http_path" in self.databricks_conn.extra_dejson:
-                self._http_path = self.databricks_conn.extra_dejson["http_path"]
-            else:
+            self._http_path = self._resolve_http_path(allow_endpoint_lookup=True)
+            if not self._http_path:
                 raise AirflowException(
                     "http_path should be provided either explicitly, "
                     "or in extra parameter of Databricks connection, "
@@ -254,8 +269,10 @@ def sqlalchemy_url(self) -> URL:
                 "Install it with: pip install 'apache-airflow-providers-databricks[sqlalchemy]'"
             )
 
+        http_path = self._resolve_http_path(allow_endpoint_lookup=False)
+
         url_query = {
-            "http_path": self._http_path,
+            "http_path": http_path,
             "catalog": self.catalog,
             "schema": self.schema,
         }