* perf(ci): start source feedback early and diagnose stalled runs
* fix(ci): verify workflow identities before main comparison limits
* fix(ci): preserve diagnostics across passing checks and install failures
* fix(ci): preserve ambiguous workflow run ordering
* fix(ci): preserve failure-report candidate and request budgets
* fix(ci): retain candidate errors while checking later main evidence
* fix(ci): retain partial reports and require complete health scans
* test(ci): prune stale fixtures and duplicated assumptions
morluto