chore: update setup-uv, prek hooks and Python dev dependencies

[Apakottur]

What

Routine dependency maintenance:

• astral-sh/setup-uv v8.3.2 -> v9.0.0
• prek autoupdate: ruff-pre-commit v0.15.21 -> v0.16.0
• Pinned dev dependencies: prek 0.4.10 -> 0.4.11, ruff 0.15.21 -> 0.16.0, ty 0.0.60 -> 0.0.64
• uv.lock refresh picks up transitive bumps (annotated-doc, annotated-types, certifi)

Notes

setup-uv v9.0.0 is a breaking release only because prune-cache now defaults to false (upstream decision to reduce load on PyPI). No workflow change is needed — the action is used with enable-cache: true and no explicit prune-cache, so the new default applies. Effect is a somewhat larger GitHub Actions cache entry.

ruff 0.16.0 stabilizes three rules that select = ["ALL"] now picks up. All three are ignored in linters/ruff.toml, consistent with existing entries:

rule	hits	why ignored
CPY001 missing-copyright-notice	150	The project uses no per-file copyright headers
ISC004 implicit-string-concatenation-in-collection	55	Fires on the deliberate line-wrapped expected-SQL literals in tests; sibling ISC001 is already ignored
PLR0917 too-many-positional-arguments	2	PLR0913 (too many arguments) is already ignored

The ruff hook id is a legacy alias in ruff-pre-commit v0.16.0 (it prints "ruff (legacy alias)"), so prek.toml now uses ruff-check.

Verified locally: all prek hooks pass, mypy and ty clean, 591 tests pass at 100% coverage.