9e832387c6
New CLI commands: - orca cluster seal: OIDC/CA-derived seal + Shamir 3-of-5 shards - orca cluster unseal: OIDC/CA unseal + --recovery Shamir path - orca doctor audit: VerifyChain + chain head report - orca doctor modes: EnforceFileModes across ORCA_HOME Fixes: - audit hash-chain race: Append uses BEGIN IMMEDIATE transaction (concurrent appends no longer corrupt tamper-evidence) - secrets rotate-master: re-seals to OIDC on sealed clusters (was writing raw key, docstring claimed re-seal) - key zeroing: ZeroKey helper + defer after master/namespace key use (defense-in-depth against pprof heap extraction) - store.Open: busy_timeout(5000) pragma (concurrent writers wait) Tests: 18 new test functions (seal round-trip, Shamir recovery, doctor audit tamper detection, doctor modes 0644 rejection, concurrent append chain integrity, rotate-master re-seal, key zeroing). ---ci--- project: orca phase: 5 milestone: v0.13 status: complete requirements: covered: [154] ---/ci---