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/tests/ZB.MOM.WW.Theme.Tests/ThemeShellTests.cs

@@ -40,4 +40,26 @@ public class ThemeShellTests : TestContext
             .Add(x => x.RailFooter, (RenderFragment)(b => b.AddMarkupContent(0, "<span class='sess'>S</span>"))));
         Assert.NotNull(cut.Find(".rail-foot .sess"));
     }
+
+    // Theme-001: the mobile hamburger must work without Bootstrap collapse JS.
+    // The shell is a native <details> disclosure whose <summary> is the toggle —
+    // no data-bs-toggle / data-bs-target attributes, so no Bootstrap JS dependency.
+    [Fact]
+    public void Mobile_toggle_is_a_css_only_details_disclosure_not_bootstrap_collapse()
+    {
+        var cut = RenderComponent<ThemeShell>(p => p.Add(x => x.Product, "OtOpcUa"));
+
+        // Root is a <details> whose direct <summary> is the hamburger toggle.
+        var shell = cut.Find("details.app-shell");
+        var summary = cut.Find("details.app-shell > summary.rail-toggle");
+        Assert.NotNull(summary);
+
+        // The rail is plain markup inside the <details> — no Bootstrap .collapse class.
+        var rail = cut.Find("#theme-rail");
+        Assert.DoesNotContain("collapse", rail.ClassList);
+
+        // No Bootstrap collapse JS hooks anywhere in the shell markup.
+        Assert.DoesNotContain("data-bs-toggle", shell.OuterHtml);
+        Assert.DoesNotContain("data-bs-target", shell.OuterHtml);
+    }
 }