chore: sync uv.lock to v2.6.1

uv.lock embeds the project's OWN version, so a pyproject.toml bump leaves the
lock disagreeing with the manifest about what this package is. Nothing errors
and no gate notices, exactly like the bun equivalent where `bun update`
leaves the lock's embedded ranges stale.

Run `uv lock` after any version bump, before committing.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: vvillait88