- chore(lint): run make lint (fails: dotenv-linter module missing after venv changes)

- chore(type-check): run `make type-check` (fails: 1275 missing type stubs across dependencies)

Details:
- `make lint` fails with `ModuleNotFoundError: No module named 'dotenv_linter.cli'`.
- `make type-check` fails with missing stubs for `opentelemetry`, `click`, `sqlalchemy`, `flask`, `pydantic`, `pydantic_settings`, etc.

Author: laipz8200

api/core/workflow/graph_engine/command_processing/command_handlers.py

@@ -46,7 +46,9 @@ def handle(self, command: GraphEngineCommand, execution: GraphExecution) -> None
             try:
                 variable = update.value
                 if list(variable.selector) != list(update.selector):
-                    variable = variable.model_copy(update={"selector": list(update.selector), "name": update.selector[1]})
+                    variable = variable.model_copy(
+                        update={"selector": list(update.selector), "name": update.selector[1]}
+                    )
                 self._variable_pool.add(update.selector, variable)
                 logger.debug("Updated variable %s for workflow %s", update.selector, execution.workflow_id)
             except ValueError as exc: