Drop Python 3.10 support

[cristian-tamblay]

Summary

Drops Python 3.10 and moves the floor to 3.11.

The strongest reason is the calendar: Python 3.10 reaches end of life on 2026-10-31, seven weeks from now. After that date it receives no security fixes, and every major library drops it around then. Moving now lets the project start on 3.11+ before that happens instead of after.

It is also already a second class experience. The lock file resolves 21 packages to an older version on 3.10 than on 3.11+, among them numpy (2.2.6 vs 2.4.6), scipy (1.15.3 vs 1.18.0), xgboost (3.2.0 vs 3.3.0) and pymc (5.23.0 vs 5.28.5). A user on 3.10 runs a different dependency stack than the one the project develops and tests against on 3.12. kaggle is the first of those where the gap turned from a silent downgrade into a break (2.x requires 3.11, see #869); it will not be the last.

Who is affected:

• Desktop installers: not at all. They bundle Python 3.12 (publish.yml).
• PyPI / uv users on 3.10: pip and uv refuse to install with a clear Requires-Python >=3.11 message. With uv the fix is uv python install 3.12; nothing on the system has to change.

No code changes. The codebase already uses 3.10+ syntax and 3.11 is a superset.

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Type of Change

Check all that apply like this [x]:

• Backend change
• Frontend change
• CI / Workflow change
• Build / Packaging change
• Bug fix
• Documentation

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Changes (by file)

• pyproject.toml: requires-python = ">=3.11", and the Python :: 3.10 classifier is removed.
• uv.lock: regenerated with uv lock. The 3.10 only resolutions collapse, which is most of the diff (-2293/+404). uv lock --check passes and no python_full_version < '3.11' marker remains.
• .github/workflows/build-test.yaml: the PR matrix drops 3.10 and runs 3.11, 3.12, 3.13.
• .github/workflows/db-migrations.yaml and .github/workflows/docs.yaml: both pinned 3.10 as the minimum supported version; they now pin 3.11.
• README.rst, AGENTS.md, docs/docs/build/dev-setup.md, docs/docs/build/testing.md and their Spanish counterparts under docs/i18n/es/: state 3.11 as the minimum.

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Testing (optional)

• uv lock --check passes.
• pyproject.toml and the three edited workflow files parse.
• The lock now carries a single kaggle entry (2.2.4); before it carried 1.7.4.5 for 3.10.

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Notes (optional)

• Migrate Kaggle authentication to API token and add dataset source #869 should add kaggle>=2 to pyproject.toml on top of this, so the constraint matches the code it introduces.
• CHANGELOG.rst is not updated: its last entry is 0.0.12 and the project is at 0.9.7, so it is not where release notes live anymore.
• DashAI/back/plugins/utils.py:20 keeps a sys.version_info < (3, 10) shim for importlib_metadata. It was already dead code on the previous floor and is left alone here to keep this change to the version bump.