fix: add config-encryption mocks to test files for CI compatibility

- Add config-encryption module mocks to gitea-enhanced.test.ts
- Add config-encryption module mocks to gitea-starred-repos.test.ts
- Update helpers mock in setup.bun.ts to include createEvent function

The CI environment was loading modules in a different order than local,
causing the config-encryption module to be accessed before it was mocked
in the global setup. Adding the mocks directly to the test files ensures
they are available regardless of module loading order.

src/lib/gitea-enhanced.test.ts

@@ -25,6 +25,14 @@ mock.module("@/lib/db", () => ({
   repositories: {}
 }));
 
+// Mock config encryption
+mock.module("@/lib/utils/config-encryption", () => ({
+  decryptConfigTokens: (config: any) => config,
+  encryptConfigTokens: (config: any) => config,
+  getDecryptedGitHubToken: (config: any) => config.githubConfig?.token || "",
+  getDecryptedGiteaToken: (config: any) => config.giteaConfig?.token || ""
+}));
+
 // Now import the modules we're testing
 import { 
   getGiteaRepoInfo,