Fix all baseline code-review findings across the six shared libraries

Resolves the 35 findings from the 2026-06-01 baseline (commit 26ba1c7),
test-first for every behavioral change. +51 tests (331 -> 382 passing, 0 failed).

- Telemetry-001 (HIGH): RedactionEnricher now honours property removal, so a
  redactor that drops a key actually scrubs the secret from the event.
- Auth: LDAP validator ValidateOnStart; API-key verify no longer fails on a
  best-effort MarkUsed write or a corrupt scopes column (fail-closed); LDAP cert
  validation hook; KeyPrefix persistence aligned; README algorithm corrected.
- Health: Akka checks return Degraded (not throw) when the cluster isn't up yet;
  GrpcDependencyHealthCheck catch-all; null 'description' rendered; composite
  endpoint builder; XML docs shipped.
- Audit: CompositeAuditWriter no longer re-throws OperationCanceledException;
  TruncatingAuditRedactor over-redact scrubs Target + safe negative max; options
  record; XML docs shipped.
- Configuration: TryAddEnumerable idempotent registration; consistent port
  quoting; strict invariant port parsing; XML docs + README packaged.
- Theme: mobile toggle is now CSS-only (no Bootstrap JS); token/CSS hygiene;
  XML docs on the public parameter surface.

Shared-contract/spec docs updated where the code was the source of truth
(observability service.instance.id, MapZbMetrics, redactor reach). All changes
additive/back-compatible at v0.1.0. code-reviews bookkeeping follows separately.

ZB.MOM.WW.Theme/README.md

@@ -7,6 +7,11 @@ woff2 fonts, and side-rail layout CSS — all served from `_content/ZB.MOM.WW.Th
 plus a set of Blazor SSR components that carry no inline colours and reuse the token
 classes. Bootstrap 5 is **not** vendored; each app keeps its own Bootstrap link.
 
+The kit ships **no JavaScript**: every interactive affordance — the narrow-viewport
+side-rail hamburger and the collapsible nav sections — is a native CSS-only
+`<details>`/`<summary>` disclosure, so the chrome works unchanged in static Blazor SSR
+with only Bootstrap **CSS** present (no Bootstrap collapse JS bundle required).
+
 ## Adopt
 
 1. Reference the NuGet package in your app; keep your own Bootstrap 5 `<link>` in `App.razor`.
@@ -83,11 +88,16 @@ Served at `_content/ZB.MOM.WW.Theme/…` by the ASP.NET static-web-asset pipelin
 `theme.css` declares `@font-face` with `url('../fonts/…')` — correct relative path from
 `css/` to `fonts/`. (OtOpcUa's original `url('fonts/…')` was a latent 404; the kit fixes it.)
 
+All colours are CSS custom-property tokens declared once in `theme.css`'s `:root` block —
+no hardcoded hex appears outside it. Derived border/hover/wash shades (e.g. `--ok-border`,
+`--warn-ink`, `--info-bg`, `--hover-bg`, `--active-bg`, `--zebra-bg`) are named tokens too,
+so a token-block edit re-themes the whole kit.
+
 ## Build
 
 ```bash
 # from ZB.MOM.WW.Theme/
 dotnet build -c Release   # TreatWarningsAsErrors — expect 0 warnings
-dotnet test               # 32 bUnit tests
+dotnet test               # 38 bUnit tests
 ./build/pack.sh           # → ./artifacts/ZB.MOM.WW.Theme.0.1.0.nupkg
 ```