The ocr oracle demanded six pangram words when ocr-clean.png prints five; the ocr-pdf oracle expected a searchable PDF when the tool's contract is text extraction; media-30s.mp4 was eight seconds long. Fix all three, regenerate tool-contract.json from current schemas, record the new fixture in the manifest, and add a QA_OUT_DIR override so parallel machines stop clobbering each other's lane output. Fixes#677.