mbproxy: strip historical phase/wave/plan references from source comments

Comments described the *history* of how the code arrived (phase numbers,
wave IDs, review IDs, dated TODOs) instead of what it does today. That
scaffolding rotted as the codebase evolved. Cleaned 60 source files +
.gitignore; behaviour unchanged (387/387 tests still pass).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

mbproxy/src/Mbproxy/Diagnostics/EventLogBridge.cs

@@ -29,9 +29,9 @@ internal sealed class EventLogBridge : ILogEventSink
     private const int MaxMessageBytes = 32 * 1024; // 32 KB Event Log limit
 
     private readonly bool _enabled;
-    // Phase 12 (W2.23) — cache the source-exists check at construction so Emit doesn't
-    // hit the registry on every Error+ log line. A missing source after start requires a
-    // service restart to pick up; in practice install.ps1 registers it once at install.
+    // Cache the source-exists check at construction so Emit doesn't hit the registry on
+    // every Error+ log line. A missing source after start requires a service restart to
+    // pick up; in practice install.ps1 registers it once at install.
     private readonly bool _sourceExists;
 
     public EventLogBridge(bool enabled)
@@ -50,7 +50,7 @@ internal sealed class EventLogBridge : ILogEventSink
         if (!_enabled) return;
         if (logEvent.Level < LogEventLevel.Error) return;
 
-        // Cached at construction (W2.23) — silently swallow if the source isn't registered.
+        // Cached at construction — silently swallow if the source isn't registered.
         // The service account may not be able to create it and we must not crash the logger.
         if (!_sourceExists) return;