fix(test): bump timeout on async ensureRepoMap tests to 30s

The 3 tests in 'ensureRepoMap (async)' time out intermittently at
jest's 5s default. The async path calls 'repoMap.checkAstGrepInstalled()'
and potentially 'repoMap.init()', both of which spawn the ast-grep
binary. Process spawn is slow on Windows (1-3s each) so the cumulative
external-binary work can push past 5s, giving false-positive timeouts.

Setting an explicit 30s timeout on these tests tolerates the legitimate
variability (slow Windows spawn, cold cache) without masking real
hangs. The sync versions (ensureRepoMapSync) don't need the bump
because they don't spawn anything.

Verified: 3 consecutive runs of __tests__/docs-patterns.test.js all
pass cleanly (~12s each).

Author: avifenesh

__tests__/docs-patterns.test.js

@@ -908,26 +908,30 @@ describe('docs-patterns', () => {
     });
 
     describe('ensureRepoMap (async)', () => {
+      // Async path can spawn ast-grep (checkAstGrepInstalled + init), which is
+      // slow to start on Windows. Default 5s jest timeout is too tight.
+      const ASYNC_TIMEOUT = 30_000;
+
       test('returns unavailable when repo-map not initialized', async () => {
         const result = await ensureRepoMap({ cwd: testDir });
         expect(result.available).toBe(false);
         expect(result.fallbackReason).toBeTruthy();
-      });
+      }, ASYNC_TIMEOUT);
 
       test('returns correct structure', async () => {
         const result = await ensureRepoMap({ cwd: testDir });
         expect(result).toHaveProperty('available');
         expect(result).toHaveProperty('map');
         expect(result).toHaveProperty('fallbackReason');
-      });
+      }, ASYNC_TIMEOUT);
 
       test('does not call askUser if repo-map module not found', async () => {
         const askUser = jest.fn();
         const result = await ensureRepoMap({ cwd: testDir, askUser });
         // askUser should not be called when module isn't available or no ast-grep
         // This depends on environment, but at minimum the structure should be correct
         expect(result).toHaveProperty('available');
-      });
+      }, ASYNC_TIMEOUT);
     });
 
     describe('findUndocumentedExports', () => {