docs(src): add missing XML docs and strip tracking-ID comments

Sweep of 203 source files resolving CommentChecker findings: add
<summary>/<param>/<returns>/<inheritdoc> where missing, and remove
resolved task/issue tracking markers (Tests-NNN, Worker-NNN, Server-NNN,
Task N) from code comments. Comment/doc-only — no logic changes.
Server+Tests build clean under TreatWarningsAsErrors.

src/ZB.MOM.WW.MxGateway.Tests/Galaxy/GalaxyFilterInputSafetyTests.cs

@@ -9,16 +9,6 @@ namespace ZB.MOM.WW.MxGateway.Tests.Galaxy;
 /// <summary>
 ///     Adversarial-input coverage for the Galaxy Repository browse filter layer.
 ///     <para>
-///         Re-triage note (finding Tests-002): the Galaxy Repository's SQL surface
-///         (<c>HierarchySql</c>, <c>AttributesSql</c>, <c>SELECT 1</c>,
-///         <c>SELECT time_of_last_deploy FROM galaxy</c>) is entirely constant — no
-///         <see cref="DiscoverHierarchyRequest"/> field is ever concatenated into a SQL
-///         string. All filters (<c>TagNameGlob</c>, <c>RootTagName</c>, category ids,
-///         template-chain filters, contained-path roots) are applied in memory by
-///         <see cref="GalaxyHierarchyProjector"/> against the cached snapshot, so there is
-///         no SQL-injection surface and no <c>LIKE</c>-escaping helper to test.
-///     </para>
-///     <para>
 ///         The genuine, testable concern is that adversarial filter strings — SQL
 ///         metacharacters (<c>'</c>, <c>;</c>) and <c>LIKE</c>-wildcards (<c>%</c>,
 ///         <c>_</c>) — are treated as opaque literals by the in-memory filter layer:
@@ -41,6 +31,7 @@ public sealed class GalaxyFilterInputSafetyTests
     ];
 
     /// <summary>Returns adversarial input cases for theory tests.</summary>
+    /// <returns>Theory data of adversarial input strings.</returns>
     public static TheoryData<string> AdversarialInputCases()
     {
         TheoryData<string> data = [];
@@ -88,7 +79,7 @@ public sealed class GalaxyFilterInputSafetyTests
     }
 
     /// <summary>
-    ///     Regression guard for finding Server-008: <see cref="GalaxyGlobMatcher"/> caches
+    ///     <see cref="GalaxyGlobMatcher"/> caches
     ///     the compiled regex per glob pattern. Repeated calls with the same pattern, and
     ///     interleaved calls with different patterns, must keep returning the correct
     ///     literal-vs-wildcard result rather than a stale cached match.
@@ -229,6 +220,7 @@ public sealed class GalaxyFilterInputSafetyTests
     ///     zero matches rather than returning the whole hierarchy or faulting.
     /// </summary>
     /// <param name="glob">An adversarial glob containing SQL metacharacters or LIKE wildcards.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Theory]
     [MemberData(nameof(AdversarialInputCases))]
     public async Task DiscoverHierarchy_WithAdversarialTagNameGlob_ReturnsZeroMatches(string glob)
@@ -249,6 +241,7 @@ public sealed class GalaxyFilterInputSafetyTests
     ///     a query fragment or matching unrelated objects.
     /// </summary>
     /// <param name="rootTagName">An adversarial tag name containing SQL metacharacters or LIKE wildcards.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Theory]
     [MemberData(nameof(AdversarialInputCases))]
     public async Task DiscoverHierarchy_WithAdversarialRootTagName_ReturnsNotFound(string rootTagName)
@@ -327,13 +320,17 @@ public sealed class GalaxyFilterInputSafetyTests
 
     private sealed class StubGalaxyHierarchyCache(GalaxyHierarchyCacheEntry current) : IGalaxyHierarchyCache
     {
-        /// <inheritdoc />
+        /// <summary>Gets the fixed cache entry returned to callers.</summary>
         public GalaxyHierarchyCacheEntry Current { get; } = current;
 
-        /// <inheritdoc />
+        /// <summary>Does nothing; the stub never refreshes.</summary>
+        /// <param name="cancellationToken">Cancellation token.</param>
+        /// <returns>A task that represents the asynchronous operation.</returns>
         public Task RefreshAsync(CancellationToken cancellationToken) => Task.CompletedTask;
 
-        /// <inheritdoc />
+        /// <summary>Does nothing; the stub is always considered loaded.</summary>
+        /// <param name="cancellationToken">Cancellation token.</param>
+        /// <returns>A task that represents the asynchronous operation.</returns>
         public Task WaitForFirstLoadAsync(CancellationToken cancellationToken) => Task.CompletedTask;
     }