uv: Skip snapshots with invalid metadata or data files

[codecov[bot]]

Codecov Report

Attention: 4 lines in your changes are missing coverage. Please review.

Comparison is base (6cd2c84) 74.28% compared to head (83c0234) 74.34%.

Files	Patch %	Lines
src/uv.c	42.85%	0 Missing and 4 partials :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #161 +/- ## ========================================== + Coverage 74.28% 74.34% +0.05% ========================================== Files 52 52 Lines 10180 10184 +4 Branches 2442 2445 +3 ========================================== + Hits 7562 7571 +9 + Misses 1265 1258 -7 - Partials 1353 1355 +2 ```

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