Ultrafuzz 0.1.2: Stable campaigns and reliable recovery

## What changed Ultrafuzz 0.1.2 fixes failures that interrupted campaigns before completion, including problems with run synchronization, event journals, and attempt and usage ledgers. The supervisor can now relaunch an engine that dies during a campaign. ## Recovery and validation `resume --retry-failed` reopens skipped work and evaluates a rerun using its own output. The release also adds stricter pull request checks, including complexity limits, unused-export detection, and an end-to-end test that kills and resumes a real engine. A breaking change now requires every launched run to be finished or canceled.