Clean up test artifacts from project root

- Move compiled test binaries to tests/binaries/
- Move profiling output files to tests/binaries/
- Add README.md for test binaries documentation
- Project root now clean of test artifacts

tests/binaries/README.md

@@ -0,0 +1,30 @@
+# Test Binaries
+
+This directory contains compiled test binaries and output files used during development and testing.
+
+## Files
+
+- `integration.test` - Compiled Go integration test binary
+- `load.test` - Compiled Go load test binary  
+- `cpu_ws.out` - WebSocket CPU profiling output
+- `cpu_load.out` - CPU load test output
+
+## Usage
+
+These files are generated during test runs and can be used for:
+- Running integration tests locally
+- Performance profiling
+- Debugging test failures
+
+## Cleanup
+
+These files can be safely deleted. They are excluded from git via `.gitignore`.
+
+To regenerate:
+```bash
+# Integration tests
+go test -c ./tests/integration/ -o tests/binaries/integration.test
+
+# Load tests  
+go test -c ./tests/load/ -o tests/binaries/load.test
+```