By: Michael Lynch <git@mtlynch.io>
Remove redundant video path verifier Rely on duration probing as the single readability check for uploaded videos. This removes the separate VideoPathVerifier API and its test-only path existence stubs.
| Time to Start | Worker time | Duration | Time to finish | |
| Config | 2s | 7s | 7s | 10s |
| Eval | 6s | 27s | 27s | 33s |
| Build | 11s | 7m08s | 1m18s | 1m29s |
| Suite | 2s | 7m44s | 1m26s | 1m29s |