fix(tools): handle callable objects in model serialization to facilitate tool calling

- The span tracing uses recursive_model_demp method to seriliaze calls within its context,
  but the call fails when one of the parameters is a Callable type (this happens, e.g., when
  trying to use OpenAI agents which accept tools as an input parameter). So this commit:
  - Modifies recursive_model_dump to safely serialize functions and callables (even if they're
    part of Pydantic models)
  - To simplify the code, only supports Pydantic v2 models.  This required dropping the pydantic v1
    calls during the build process.
- Fix openai_activities.py#FunctionTool type hints for callable to match openai agents lib
- Adds test coverage for function serialization edge cases

This fixes tool calling issues where Pydantic models containing function
objects would fail during serialization, causing runtime errors in agent
workflows. Tested by adding a project locally with tool calling

Author: chakrris

requirements-dev.lock

@@ -15,58 +15,151 @@ aiohappyeyeballs==2.6.1
 aiohttp==3.12.8
     # via agentex-sdk
     # via httpx-aiohttp
+    # via litellm
 aiosignal==1.3.2
     # via aiohttp
 annotated-types==0.6.0
     # via pydantic
-anyio==4.4.0
+anyio==4.10.0
     # via agentex-sdk
     # via httpx
+    # via mcp
+    # via openai
+    # via scale-gp
+    # via scale-gp-beta
+    # via sse-starlette
+    # via starlette
+    # via watchfiles
+appnope==0.1.4
+    # via ipykernel
 argcomplete==3.1.2
     # via nox
-async-timeout==5.0.1
-    # via aiohttp
+asttokens==3.0.0
+    # via stack-data
 attrs==25.3.0
     # via aiohttp
+    # via jsonschema
+    # via referencing
+cachetools==5.5.2
+    # via google-auth
 certifi==2023.7.22
     # via httpcore
     # via httpx
+    # via kubernetes
+    # via requests
+charset-normalizer==3.4.3
+    # via requests
+click==8.2.1
+    # via litellm
+    # via typer
+    # via uvicorn
+colorama==0.4.6
+    # via griffe
 colorlog==6.7.0
     # via nox
+comm==0.2.3
+    # via ipykernel
+debugpy==1.8.16
+    # via ipykernel
+decorator==5.2.1
+    # via ipython
 dirty-equals==0.6.0
 distlib==0.3.7
     # via virtualenv
 distro==1.8.0
     # via agentex-sdk
-exceptiongroup==1.2.2
-    # via anyio
-    # via pytest
+    # via openai
+    # via scale-gp
+    # via scale-gp-beta
 execnet==2.1.1
     # via pytest-xdist
+executing==2.2.0
+    # via stack-data
+fastapi==0.115.14
+    # via agentex-sdk
 filelock==3.12.4
+    # via huggingface-hub
     # via virtualenv
 frozenlist==1.6.2
     # via aiohttp
     # via aiosignal
+fsspec==2025.7.0
+    # via huggingface-hub
+google-auth==2.40.3
+    # via kubernetes
+griffe==1.12.0
+    # via openai-agents
 h11==0.16.0
     # via httpcore
+    # via uvicorn
+hf-xet==1.1.7
+    # via huggingface-hub
 httpcore==1.0.9
     # via httpx
-httpx==0.28.1
+httpx==0.27.2
     # via agentex-sdk
     # via httpx-aiohttp
+    # via litellm
+    # via mcp
+    # via openai
     # via respx
+    # via scale-gp
+    # via scale-gp-beta
 httpx-aiohttp==0.1.8
     # via agentex-sdk
+httpx-sse==0.4.1
+    # via mcp
+huggingface-hub==0.34.4
+    # via tokenizers
 idna==3.4
     # via anyio
     # via httpx
+    # via requests
     # via yarl
 importlib-metadata==7.0.0
+    # via litellm
 iniconfig==2.0.0
     # via pytest
+ipykernel==6.30.1
+    # via agentex-sdk
+ipython==9.4.0
+    # via ipykernel
+ipython-pygments-lexers==1.1.1
+    # via ipython
+jedi==0.19.2
+    # via ipython
+jinja2==3.1.6
+    # via agentex-sdk
+    # via litellm
+jiter==0.10.0
+    # via openai
+jsonref==1.1.0
+    # via agentex-sdk
+jsonschema==4.25.0
+    # via agentex-sdk
+    # via litellm
+    # via mcp
+jsonschema-specifications==2025.4.1
+    # via jsonschema
+jupyter-client==8.6.3
+    # via ipykernel
+jupyter-core==5.8.1
+    # via ipykernel
+    # via jupyter-client
+kubernetes==28.1.0
+    # via agentex-sdk
+litellm==1.75.5.post1
+    # via agentex-sdk
 markdown-it-py==3.0.0
     # via rich
+markupsafe==3.0.2
+    # via jinja2
+matplotlib-inline==0.1.7
+    # via ipykernel
+    # via ipython
+mcp==1.12.4
+    # via agentex-sdk
+    # via openai-agents
 mdurl==0.1.2
     # via markdown-it-py
 multidict==6.4.4
@@ -76,59 +169,227 @@ mypy==1.14.1
 mypy-extensions==1.0.0
     # via mypy
 nest-asyncio==1.6.0
+    # via ipykernel
+nexus-rpc==1.1.0
+    # via temporalio
 nodeenv==1.8.0
     # via pyright
 nox==2023.4.22
+oauthlib==3.3.1
+    # via kubernetes
+    # via requests-oauthlib
+openai==1.99.9
+    # via litellm
+    # via openai-agents
+openai-agents==0.2.6
+    # via agentex-sdk
 packaging==23.2
+    # via huggingface-hub
+    # via ipykernel
     # via nox
     # via pytest
+parso==0.8.4
+    # via jedi
+pexpect==4.9.0
+    # via ipython
 platformdirs==3.11.0
+    # via jupyter-core
     # via virtualenv
 pluggy==1.5.0
     # via pytest
+prompt-toolkit==3.0.51
+    # via ipython
+    # via questionary
 propcache==0.3.1
     # via aiohttp
     # via yarl
+protobuf==5.29.5
+    # via temporalio
+psutil==7.0.0
+    # via ipykernel
+ptyprocess==0.7.0
+    # via pexpect
+pure-eval==0.2.3
+    # via stack-data
+pyasn1==0.6.1
+    # via pyasn1-modules
+    # via rsa
+pyasn1-modules==0.4.2
+    # via google-auth
 pydantic==2.10.3
     # via agentex-sdk
+    # via fastapi
+    # via litellm
+    # via mcp
+    # via openai
+    # via openai-agents
+    # via pydantic-settings
+    # via python-on-whales
+    # via scale-gp
+    # via scale-gp-beta
 pydantic-core==2.27.1
     # via pydantic
+pydantic-settings==2.10.1
+    # via mcp
 pygments==2.18.0
+    # via ipython
+    # via ipython-pygments-lexers
+    # via pytest
     # via rich
+pyjwt==2.10.1
+    # via redis
 pyright==1.1.399
-pytest==8.3.3
+pytest==8.4.1
+    # via agentex-sdk
     # via pytest-asyncio
     # via pytest-xdist
-pytest-asyncio==0.24.0
+pytest-asyncio==1.1.0
+    # via agentex-sdk
 pytest-xdist==3.7.0
 python-dateutil==2.8.2
+    # via jupyter-client
+    # via kubernetes
     # via time-machine
+python-dotenv==1.1.1
+    # via litellm
+    # via mcp
+    # via pydantic-settings
+python-multipart==0.0.20
+    # via mcp
+python-on-whales==0.73.0
+    # via agentex-sdk
 pytz==2023.3.post1
     # via dirty-equals
+pyyaml==6.0.2
+    # via agentex-sdk
+    # via huggingface-hub
+    # via kubernetes
+pyzmq==27.0.1
+    # via ipykernel
+    # via jupyter-client
+questionary==2.1.0
+    # via agentex-sdk
+redis==5.3.1
+    # via agentex-sdk
+referencing==0.36.2
+    # via jsonschema
+    # via jsonschema-specifications
+regex==2025.7.34
+    # via tiktoken
+requests==2.32.4
+    # via huggingface-hub
+    # via kubernetes
+    # via openai-agents
+    # via python-on-whales
+    # via requests-oauthlib
+    # via tiktoken
+requests-oauthlib==2.0.0
+    # via kubernetes
 respx==0.22.0
-rich==13.7.1
+rich==13.9.4
+    # via agentex-sdk
+    # via typer
+rpds-py==0.27.0
+    # via jsonschema
+    # via referencing
+rsa==4.9.1
+    # via google-auth
 ruff==0.9.4
+    # via agentex-sdk
+scale-gp==0.1.0a59
+    # via agentex-sdk
+scale-gp-beta==0.1.0a20
+    # via agentex-sdk
 setuptools==68.2.2
     # via nodeenv
+shellingham==1.5.4
+    # via typer
 six==1.16.0
+    # via kubernetes
     # via python-dateutil
 sniffio==1.3.0
     # via agentex-sdk
     # via anyio
+    # via httpx
+    # via openai
+    # via scale-gp
+    # via scale-gp-beta
+sse-starlette==3.0.2
+    # via mcp
+stack-data==0.6.3
+    # via ipython
+starlette==0.46.2
+    # via fastapi
+    # via mcp
+temporalio==1.15.0
+    # via agentex-sdk
+tiktoken==0.11.0
+    # via litellm
 time-machine==2.9.0
-tomli==2.0.2
-    # via mypy
-    # via pytest
+tokenizers==0.21.4
+    # via litellm
+tornado==6.5.2
+    # via ipykernel
+    # via jupyter-client
+tqdm==4.67.1
+    # via huggingface-hub
+    # via openai
+    # via python-on-whales
+traitlets==5.14.3
+    # via ipykernel
+    # via ipython
+    # via jupyter-client
+    # via jupyter-core
+    # via matplotlib-inline
+typer==0.16.0
+    # via agentex-sdk
+    # via mcp
+    # via python-on-whales
+types-protobuf==6.30.2.20250809
+    # via temporalio
+types-requests==2.31.0.6
+    # via openai-agents
+types-urllib3==1.26.25.14
+    # via types-requests
 typing-extensions==4.12.2
     # via agentex-sdk
     # via anyio
-    # via multidict
+    # via fastapi
+    # via huggingface-hub
     # via mypy
+    # via nexus-rpc
+    # via openai
+    # via openai-agents
     # via pydantic
     # via pydantic-core
     # via pyright
+    # via python-on-whales
+    # via referencing
+    # via scale-gp
+    # via scale-gp-beta
+    # via temporalio
+    # via typer
+    # via typing-inspection
+typing-inspection==0.4.1
+    # via pydantic-settings
+tzdata==2025.2
+    # via agentex-sdk
+tzlocal==5.3.1
+    # via agentex-sdk
+urllib3==1.26.20
+    # via kubernetes
+    # via requests
+uvicorn==0.35.0
+    # via agentex-sdk
+    # via mcp
 virtualenv==20.24.5
     # via nox
+watchfiles==0.24.0
+    # via agentex-sdk
+wcwidth==0.2.13
+    # via prompt-toolkit
+websocket-client==1.8.0
+    # via kubernetes
 yarl==1.20.0
     # via aiohttp
 zipp==3.17.0