.tool-versions(uv) uv 0.12.0 -> 0.12.1

why: 0.12.1 is the newest uv past the 3-day window this setup applies to
package resolution (`exclude-newer` in the uv config, `min-release-age`
in .npmrc). Toolchain pins are resolved by mise and are not gated by
those settings, but holding the resolver binary itself to the same
window keeps one policy rather than two. 0.12.2 (2026-08-05) and 0.12.3
(2026-08-07) are both inside the window and are deliberately skipped.

what the release changes here: canonical uv lockfiles are parsed
directly with a TOML fallback, so lock reads get cheaper; shell startup
files are flushed before the command exits; and `--find-links` paths in
requirements files now resolve relative to the containing file, which
is inert here since no requirements file in this repo uses them.

- uv
  - https://github.com/astral-sh/uv/blob/0.12.1/CHANGELOG.md
  - https://github.com/astral-sh/uv/releases/tag/0.12.1

Author: tony

.tool-versions

@@ -1,3 +1,3 @@
 just 1.58.0
-uv 0.12.0
+uv 0.12.1
 python 3.14 3.13 3.12 3.11 3.10