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feat(secrets): cluster replication via SQL Server and Akka.NET (G-7, 0.2.0)

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Secrets were per-node SQLite, so a secret written on one node was invisible to
the rest of a cluster. G-7's design resolved the "shared SQL store vs Akka
replicator" fork to build only the former; both are built here so the choice is
a deployment decision (availability vs partition tolerance) rather than a
library limitation.

Two new packages — ZB.MOM.WW.Secrets.Replicator.SqlServer (shared store, plus a
local-store-with-hub mode) and .Replicator.AkkaDotNet (peer-to-peer over
distributed pub/sub). Core gains ISecretsStoreMigrator, one shared
SecretLastWriterWins predicate so no two stores can disagree on a tie, the
transport-agnostic reconciler, and ReplicatingSecretStore — which closes a real
gap: nothing had ever called ISecretReplicator.PublishAsync, so the seam was
inert and local writes would not have propagated at all.

Verified 182 pass / 1 skip / 0 warnings, including 15 live tests against a real
SQL Server 2022 (the SQLite suite ported case-for-case, so any behavioural
divergence between the stores fails) and a 9-test in-process 2-node Akka
cluster over real remoting. A post-build review caught six defects, all fixed
and now covered: both replication modes could not resolve from the container
(no test had built one), an unbounded fetch that broke past SQL Server's
2100-parameter cap, a poison row that aborted the rest of its batch forever,
Enum.Parse on peer input that could restart the actor in a loop, null crypto
blobs crossing the trust boundary, and a silently dropped pull-read failure.

Packed at 0.2.0 and vulnerability-scanned clean; not yet published to the feed.

Claude-Session: https://claude.ai/code/session_01BL2Vu1ESDQ9SCN4gVKkdts
This commit is contained in:
Joseph Doherty
2026-07-18 04:08:23 -04:00
parent e46060fada
commit dd0a846b64
55 changed files with 4848 additions and 51 deletions
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docs/plans/2026-07-17-secrets-g7-clustered-replication-design.md
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# G-7 — Clustered secret replication: design & fork resolution
> **✅ SUPERSEDED BY THE BUILD, 2026-07-18.** This document resolved the fork to Option A and
> deferred Option B. On the user's instruction **both were built**, as
> `ZB.MOM.WW.Secrets.Replicator.SqlServer` (shared-store *and* hub modes) and
> `ZB.MOM.WW.Secrets.Replicator.AkkaDotNet`. The fork analysis below is still the right way to
> *choose* between them — it is now a deployment decision, not a build one. The "Decision" section's
> YAGNI reasoning for deferring Option B no longer applies.
> **Status:** design-only (G-7 in [`components/secrets/GAPS.md`](../../components/secrets/GAPS.md)).
> Companion executable plan: [`2026-07-17-secrets-g7-sqlserver-store.md`](2026-07-17-secrets-g7-sqlserver-store.md).
> Prerequisite G-2…G-6 have landed for both clustered apps (ScadaBridge, OtOpcUa); G-8 (KEK