Require Python 3.11, matching the llmdojo floor

[chaosisnotrandomitisrhythmic]

One character. requires-python = ">=3.10" while the sole runtime dependency, llmdojo>=0.0.3, requires >=3.11.

uv resolves across the whole declared range, so it fails on the 3.10 leg before it ever reaches the interpreter actually in use. On a clean checkout with Python 3.13:

Because the requested Python version (>=3.10) does not satisfy Python>=3.11 and
llmdojo>=0.0.3 depends on Python>=3.11, we can conclude that llmdojo>=0.0.3 cannot be used.
...
hint: The `requires-python` value (>=3.10) includes Python versions that are not supported
by your dependencies (e.g., llmdojo>=0.0.3 only supports >=3.11).

uv run pytest is therefore unusable on a fresh clone. With the floor corrected the environment builds and tests/test_harness.py passes:

....                                                                     [100%]
4 passed in 0.12s

One thing this does not fix

tests/test_looker.py still fails to import, for an unrelated reason:

aai_coding/looker.py:5: in <module>
    import Quartz
E   ModuleNotFoundError: No module named 'Quartz'

Quartz (pyobjc) is not among the declared dependencies. Left alone here since it is a separate question, and macOS-only, so it may want an extra rather than a hard dependency.

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