Fix ruff target version and mypy pre-commit hook

[zigpy-review-bot]

Problems

• [tool.ruff] target-version = "py39" does not match requires-python = ">=3.12". ruff 0.6.2 accepted the existing match statement anyway, but current ruff reports it as invalid-syntax for Python 3.9.
• The local mypy hook runs uv run --frozen mypy, but mypy is in the testing dependency group. In a venv synced without that group (for example after a plain uv sync), the hook fails with "Failed to spawn: mypy". CI is unaffected because it syncs the ci group, which includes testing.

Changes

• target-version = "py312", matching requires-python.
• The mypy hook runs uv run --frozen --group testing mypy.
• ruff-pre-commit v0.6.2 → v0.16.9 (hook id ruff → ruff-check, the old id is now a legacy alias) and codespell v2.3.0 → v2.4.3.
• Second commit: the resulting ruff changes, timezone.utc → UTC (UP017, from the new target) and ruff 0.16's parenthesized multi-line lambda bodies. No behaviour change.

Verification

• pre-commit run --all-files passes on Python 3.14, including mypy in a venv without the testing group.
• Tests: 101 passed.

Context

This is one of a set of draft PRs that align the pre-commit setup of the zigpy libraries on ruff (ruff check + ruff format), which zigpy, zha, zha-device-handlers, zigpy-znp, zigpy-ota and zigpy-ziggurat already use. The same change is proposed for bellows, zigpy-deconz, zigpy-xbee, zigpy-zigate and zigpy-cli, plus small ruff config fixes in zigpy and zigpy-ziggurat.

The commits are kept separate so parts can be dropped or moved into their own PR. Maintainers can ask the bot for that, or for any other change, by commenting @zigpy-review-bot <request> on this PR.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (2e209a1) to head (90bd027).

Additional details and impacted files

@@            Coverage Diff            @@
##               dev        #9   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            6         6           
  Lines         1185      1185           
=========================================
  Hits          1185      1185           

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[Copilot]

Copilot review overview

🟢 Approval recommended

No unresolved review issues remain, and all verification checks pass.

Review effort: Lite
Findings: None

What changed in this PR

Updates Ruff and pre-commit configuration for Python 3.12, fixes mypy dependency resolution, and applies resulting formatting changes.

Changes:

• Targets Ruff at Python 3.12.
• Updates Ruff and codespell hooks.
• Runs mypy with the testing dependency group.
• Modernizes UTC usage and formats multiline lambdas.

File	Description
zigpy_ziggurat/​zigbee/​wire.py	Ruff formatting updates
zigpy_ziggurat/​zigbee/​application.py	Uses datetime.UTC
pyproject.toml	Sets Ruff target to Python 3.12
.pre-commit-config.yaml	Updates hooks and mypy invocation

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