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.Auth/src/ZB.MOM.WW.Auth.Ldap/LdapAuthService.cs

@@ -26,10 +26,14 @@ public sealed class LdapAuthService : ILdapAuthService
 
     /// <summary>
     /// Production constructor: binds against a live directory via the real
-    /// Novell-backed connection factory.
+    /// Novell-backed connection factory. The TLS server-certificate validation policy
+    /// (<see cref="LdapOptions.ServerCertificateValidationCallback"/> or the
+    /// <see cref="LdapOptions.AllowInsecure"/> bypass) is carried into the factory so each
+    /// connection is built with it.
     /// </summary>
     public LdapAuthService(LdapOptions options)
-        : this(options, new NovellLdapConnectionFactory())
+        : this(options, new NovellLdapConnectionFactory(
+            options.AllowInsecure, options.ServerCertificateValidationCallback))
     {
     }
 
@@ -92,7 +96,13 @@ public sealed class LdapAuthService : ILdapAuthService
             //       Abstractions change could add DirectoryUnavailable to disambiguate.
             try
             {
-                conn.Connect(_options.Server, _options.Port, _options.Transport, _options.AllowInsecure, _options.ConnectionTimeoutMs);
+                conn.Connect(
+                    _options.Server,
+                    _options.Port,
+                    _options.Transport,
+                    _options.AllowInsecure,
+                    _options.ConnectionTimeoutMs,
+                    _options.ServerCertificateValidationCallback);
             }
             catch (LdapException)
             {