Packaging: review the strict Python 3.13 requirement or add CI evidence that it is necessary

[francescobianco]

Summary

The package declares requires-python = ">=3.13", but most of the codepath looks compatible with Python 3.11/3.12. This blocks adoption in many existing AI stacks where 3.11 or 3.12 is the standard runtime.

Reproduction

1. Try installing the package in a Python 3.12 environment.
2. The resolver rejects it immediately because of the declared version floor.

Expected

Either:

• officially support 3.11/3.12 and add CI coverage, or
• document the exact 3.13-only language/runtime dependency that justifies the current floor.

Actual

The strict version floor prevents evaluation even before runtime testing.

Why it matters

This is a practical blocker for users integrating MCP servers into existing Django, FastAPI, and agent platforms.