New operations runbook (enable/disable, fail-closed ApiKey rule, stop/start-
together, tombstone-retention window, MaxBatchSize row-count-vs-4MB, never
sqlite3-a-live-WAL-DB cp-triplet recipe). Configuration.md gains a LocalDb
section; Redundancy.md gains a pair-local config cache section (what boot-from-
cache does and does not cover); CLAUDE.md gains the Phase 1 scope paragraph.
OtOpcUa is Akka-clustered and AddZbSecrets is registered unconditionally, so every
node (admin, driver, fused) resolves secrets and needs the SAME KEK + same store rows.
Ship G-5 as a production-posture runbook rather than hardcoding Source=File + shared
paths into the committed role-overlay appsettings (which dev + TwoNodeClusterHarness
also consume — that would break every dev/CI boot). Base appsettings stays on
Source=Environment. Documents the interim File-KEK + shared-SQLite posture and the
G-7 hand-off (ConfigDb-backed ISecretStore mirroring the existing DP
PersistKeysToDbContext<OtOpcUaConfigDbContext> key-ring sharing). Cross-linked from
docs/security.md. Mirrors the ScadaBridge G-5 resolution.
Joseph Doherty