* fix(cso): Python and Rails repairs verify and replay; killed attempts leave no scratch
- Python offline preparation sets SOURCE_DATE_EPOCH so .pyc bytecode is reproducible.
- Prepared identity hashes skip RubyGems/mini_portile build diagnostics that name random build dirs.
- Rails verification attempts and replays get 900 s; the attempt watchdog, Docker
verification executor and assertion witness share MAX_VERIFICATION_ATTEMPT_MS.
- resume and finish reclaim a killed attempt's scratch once its watchdog recorded cleanup.
v1.91.34.0
* Format lib/cso with prettier
* Take v1.91.36.0 (1.91.35.0 is claimed by #3073)