build(uv): regenerate uv.lock with current uv

Prior regeneration used an older uv that stripped revision = 2 and
every upload-time field — 800+ lines of noise unrelated to the
feature. Lockfile is now back to a minimal +12/-1 delta covering
only the cloudpickle dependency addition.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: timsaucer