fix(core): fix Pydantic v1 support in tools/runnable

[cbornet]

As per its doc BaseTool args_schema can be a Pydantic v1 model.
This PR fixes TypeBaseModel so it includes pydantic.v1.BaseModel.
This detected a few places in the code where a v1 args_schema results in an exception:

• runnable.get_input_schema(config).model_fields --> get_fields(runnable.get_input_schema(config))
• runnable.get_input_schema(config).model_json() --> runnable.get_input_jsonschema(config)

[codspeed-hq]

CodSpeed Performance Report

Merging #33698 will not alter performance

_{Comparing cbornet:pydantic-v1-runnable (28754b8) with master (62769a0)}

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

Summary

✅ 13 untouched
⏩ 21 skipped¹

Footnotes

1. 21 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩