feat: Phase 8 complete -- CP8-5 stability gate, lease grant fix, Docker e2e, 13 chaos scenarios
Phase 8 closes with all 6 checkpoints done (CP8-1 through CP8-5 + CP8-3-1):
- CP8-5: 12/12 enterprise QA scenarios PASS on real hardware (m01/M02)
- Master-authoritative lease grants (BUG-CP85-11): master renews primary
write leases on every heartbeat response, replacing retain-until-confirmed
assignment queue semantics that caused 30s lease expiry
- Post-rebuild WAL shipping gap fix (BUG-CP85-1): syncLSNAfterRebuild
advances replica nextLSN so WAL entries are accepted after rebuild
- Block heartbeat startup race fix (BUG-CP85-10): dynamic blockService
check on each tick instead of one-shot at loop start
- 8 new tests: 4 engine lease grant + 4 registry lease grant
- 13 new YAML scenarios: chaos (kill-loop, partition, disk-full),
database integrity (sqlite crash, ext4 fsck), perf baseline,
metrics verify, snapshot stress, expand-failover, session storm,
role flap, 24h soak
- 12 new testrunner actions (database, fsck, grep_log, write_loop_bg,
stop_bg, assert_metric_gt/eq/lt) + phase repeat support
- Docker compose setup + getting-started guide for block storage users
- 960+ cumulative unit tests, 24 YAML scenarios
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>