Release v3.2.4 - Fix metadata mirroring authentication issues

Fixed critical authentication issue causing "user does not exist [uid: 0]" errors during metadata mirroring operations. This release addresses Issue #68 and ensures proper authentication validation before all Gitea operations.

Key improvements:
- Pre-flight authentication validation for all Gitea operations
- Consistent token decryption across all API calls
- Repository existence verification before metadata operations
- Graceful fallback to user account when org creation fails
- Enhanced error messages with specific troubleshooting guidance
- Added diagnostic test scripts for authentication validation

This patch ensures metadata mirroring (issues, PRs, labels, milestones) works reliably without authentication errors.

src/lib/gitea-enhanced.test.ts

@@ -49,6 +49,24 @@ let createOrgCalled = false;
 
 const mockHttpGet = mock(async (url: string, headers?: any) => {
   // Return different responses based on URL patterns
+  
+  // Handle user authentication endpoint
+  if (url.includes("/api/v1/user")) {
+    return {
+      data: {
+        id: 1,
+        login: "testuser",
+        username: "testuser",
+        email: "test@example.com",
+        is_admin: false,
+        full_name: "Test User"
+      },
+      status: 200,
+      statusText: "OK",
+      headers: new Headers()
+    };
+  }
+  
   if (url.includes("/api/v1/repos/starred/test-repo")) {
     return { 
       data: {