feat(batch1): add init parity hooks for ciphers and constants

dotnet/src/ZB.MOM.NatsNet.Server/Auth/CipherSuites.cs

@@ -56,6 +56,16 @@ public static class CipherSuites
         CipherMapById = byId;
     }
 
+    /// <summary>
+    /// Compatibility init hook for PortTracker parity with Go <c>init()</c>.
+    /// Safe and idempotent.
+    /// </summary>
+    public static void Init()
+    {
+        _ = CipherMap;
+        _ = CipherMapById;
+    }
+
     /// <summary>
     /// Returns the default set of TLS 1.2 cipher suites.
     /// .NET manages cipher suite selection at the OS/SChannel/OpenSSL level;

dotnet/src/ZB.MOM.NatsNet.Server/ServerConstants.cs

@@ -214,6 +214,15 @@ public static class ServerConstants
         GitCommit = string.Empty;
     }
 
+    /// <summary>
+    /// Compatibility init hook for PortTracker parity with Go <c>init()</c>.
+    /// Safe and idempotent.
+    /// </summary>
+    public static void Init()
+    {
+        _ = GitCommit;
+    }
+
     /// <summary>
     /// Truncates a VCS revision string to 7 characters for display.
     /// Mirrors <c>formatRevision</c> in const.go.

dotnet/tests/ZB.MOM.NatsNet.Server.Tests/Auth/CipherSuitesTests.cs

@@ -24,6 +24,19 @@ namespace ZB.MOM.NatsNet.Server.Tests.Auth;
 /// </summary>
 public class CipherSuitesTests
 {
+    [Fact]
+    public void Init_CalledMultipleTimes_RemainsIdempotent()
+    {
+        var beforeCount = CipherSuites.CipherMap.Count;
+        var beforeByIdCount = CipherSuites.CipherMapById.Count;
+
+        CipherSuites.Init();
+        CipherSuites.Init();
+
+        CipherSuites.CipherMap.Count.ShouldBe(beforeCount);
+        CipherSuites.CipherMapById.Count.ShouldBe(beforeByIdCount);
+    }
+
     [Fact]
     public void CipherMap_ContainsTls13Suites()
     {

dotnet/tests/ZB.MOM.NatsNet.Server.Tests/ServerTests.cs

@@ -32,6 +32,17 @@ namespace ZB.MOM.NatsNet.Server.Tests;
 /// </summary>
 public sealed class ServerTests
 {
+    [Fact]
+    public void Init_CalledMultipleTimes_RemainsIdempotent()
+    {
+        var before = ServerConstants.GitCommit;
+
+        ServerConstants.Init();
+        ServerConstants.Init();
+
+        ServerConstants.GitCommit.ShouldBe(before);
+    }
+
     // =========================================================================
     // TestSemanticVersion — Test ID 2866
     // Validates that ServerConstants.Version matches semver format.