docs(tests): fix CommentChecker findings across tests/ — 13,392 → 0 (repo-wide scan clean)

Comment/XML-doc changes only:
- add summaries to ~10k test methods, fixtures, fakes and helpers
  (+ <param> on theories, <returns> on async Task methods,
  <inheritdoc/> on interface implementations the checker can resolve)
- strip ~2.6k project-tracking references (WP*, P*-*, row-NN, Task N,
  #NN, Component-0NN) from comments, keeping the explanatory text;
  reword false positives in comments only
- real docs on fakes implementing BCL/library interfaces
  (IDisposable, ILogger, IOptionsMonitor, IAsyncLifetime)
- reword the last 5 src/ false positives (CWE-1236, failures-1,
  year-0001, M365)

Only non-comment edits: four one-line nested classes split across lines
so members can carry docs. Build 0 errors / 0 warnings.

tests/ZB.MOM.WW.ScadaBridge.Security.Tests/ForwardedHeadersSetupTests.cs

@@ -6,10 +6,12 @@ namespace ZB.MOM.WW.ScadaBridge.Security.Tests;
 
 public class ForwardedHeadersSetupTests
 {
+    /// <summary>Verifies that building with forwarded headers disabled returns null.</summary>
     [Fact]
     public void Build_Disabled_ReturnsNull()
         => Assert.Null(ForwardedHeadersSetup.Build(new ForwardedHeadersSecurityOptions { Enabled = false }));
 
+    /// <summary>Verifies that enabling forwarded headers parses the proxies and networks and clears the default allow-lists.</summary>
     [Fact]
     public void Build_Enabled_ParsesProxiesAndNetworks_AndClearsDefaults()
     {
@@ -27,6 +29,9 @@ public class ForwardedHeadersSetupTests
         Assert.Single(built.KnownIPNetworks); // net10 successor to the deprecated KnownNetworks
     }
 
+    /// <summary>Verifies that a malformed proxy or network entry throws at startup.</summary>
+    /// <param name="proxy">The proxy address entry under test.</param>
+    /// <param name="network">The network CIDR entry under test.</param>
     [Theory]
     [InlineData("not-an-ip", "172.16.0.0/12")]
     [InlineData("10.5.0.9", "not-a-cidr")]