fix(ci): resolve CI pipeline failures

- Fix jest command not found in coverage job by using npx jest
- Fix lint command in CI/CD pipeline to use lint:check
- Fix E2E test helper conditionalDescribe function to properly skip tests when Docker images are missing

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.github/workflows/ci.yml

@@ -111,7 +111,7 @@ jobs:
       run: npm ci --prefer-offline --no-audit
 
     - name: Generate test coverage
-      run: jest --coverage --testPathPattern='test/(unit|integration).*\.test\.js$'
+      run: npx jest --coverage --testPathPattern='test/(unit|integration).*\.test\.js$'
       env:
         NODE_ENV: test
         BOT_USERNAME: '@TestBot'

.github/workflows/deploy.yml

@@ -37,7 +37,7 @@ jobs:
         run: npm ci --prefer-offline --no-audit
       
       - name: Run linter
-        run: npm run lint
+        run: npm run lint:check
       
       - name: Run tests
         run: npm test