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c39080ceaa
Add HTTP admin server to iscsi-target binary (POST /assign, GET /status, POST /replica, POST /rebuild) and 7 HA integration tests validating failover, split-brain prevention, epoch fencing, and demote-under-IO. New files: - admin.go: HTTP admin endpoint with input validation - ha_target.go: HATarget helper wrapping Target + admin HTTP calls - ha_test.go: 7 HA tests (all PASS on WSL2, 67.7s total) Bug fixes: - BUG-CP4B4-1: CmdSN init (expCmdSN=0 not 1, first SCSI cmd was dropped) - BUG-CP4B4-2: RoleNone->RoleReplica missing SetEpoch (WAL rejected) - BUG-CP4B4-3: replica applyEntry didn't update vol.nextLSN (status=0) - BUG-CP4B4-4: PID discovery killed primary instead of replica (shared binPath; fixed by grepping volFile) - BUG-CP4B4-5: artifact collector overwrote primary log with replica log (added CollectLabeled method) Also: 3s write deadline on WAL shipper data connection to avoid 120s TCP retransmission timeout when replica is dead. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>