1.14.4

## What's Changed

### Features
- Add support for custom persistence key in @persist
- Add Responses API support for Azure OpenAI provider
- Forward credential_scopes to Azure AI Inference client
- Add Vertex AI workload identity setup guide
- Add Tavily Research and get Research
- Add You.com MCP tools for search, research, and content extraction

### Bug Fixes
- Fix fall through when JSON regex match isn't valid JSON
- Fix to preserve tool_calls when response also contains text
- Fix to forward base_url and api_key to instructor.from_provider
- Fix to warn and return empty when native MCP server returns no tools
- Fix to use validated messages variable in non-streaming handlers
- Fix to guard crew chat description helpers against LLM failures
- Fix to reset messages and iterations between invocations
- Fix to forward trained-agents file through replay and test
- Fix to honor custom trained-agents file at inference
- Fix to bind task-only agents to crew for multimodal input_files
- Fix to serialize guardrail callables as null for JSON checkpointing
- Fix renaming of force_final_answer to avoid self-referential router
- Fix bump of litellm for SSTI fix; ignore unfixable pip CVE

### Documentation
- Update changelog and version for v1.14.4a1
- Add E2B Sandbox Tools page
- Add Daytona sandbox tools documentation

## Contributors

@EdwardIrby, @dependabot[bot], @factory-droid-oss, @factory-droid[bot], @greysonlalonde, @kunalk16, @lorenzejay, @lucasgomide, @manisrinivasan2k1, @mattatcha, @vinibrsl