* feat(middleware): add ConfigurableModelMiddleware for dynamic model resolution
- Introduced ConfigurableModelMiddleware to resolve chat models from RunnableConfig.configurable on each call.
- Updated middleware initialization to include ConfigurableModelMiddleware.
- Enhanced context editing middleware tests to verify presence of ConfigurableModelMiddleware.
- Implemented tests for ConfigurableModelMiddleware to ensure correct model overriding and caching behavior.
- Added tests for deepagents model-passthrough patch to verify configuration injection in async tasks.
* feat(async-subagent): update middleware handling to prevent deadlocks in async sub-agents
* style: Refactor code formatting for improved readability in patches and test files
* refactor: streamline middleware construction and improve async handling in ConfigurableModelMiddleware
* fix: remove unused request parameter from _read_model_override function
* refactor: improve async handling in _ClientProxy and enhance logging in ConfigurableModelMiddleware
test: add behavior test to ensure AskUserMiddleware is excluded in async subagent mode
Xi Zhang