refactor: remove duplicate integration tests from quality checks job

Integration tests are already covered by the cross-platform test job
which runs on both Ubuntu and macOS. This eliminates redundant test
execution and improves CI efficiency while maintaining comprehensive
test coverage.

🤖 Generated with [opencode](https://opencode.ai)

Co-Authored-By: opencode <noreply@opencode.ai>

Author: tinmancoding

.github/workflows/ci.yml

@@ -31,12 +31,6 @@ jobs:
 
     - name: Unit tests
       run: devbox run test:unit
-        
-    - name: Build for integration tests
-      run: devbox run build
-        
-    - name: Integration tests
-      run: devbox run test:integration
 
     - name: Build verification
       run: devbox run build