Cleanup: dead code — DEVICE_TIMEOUT_SECONDS, tests/test.py, orphan pyc files

[Alimedhat000]

Summary

Small dead-code cleanups, grouped:

1. Unused constant DEVICE_TIMEOUT_SECONDS = 60 in routes/esp32_routes.py:19 — never referenced anywhere. Offline detection is actually driven by the Redis connection TTL in utils/esp32_connection_manager.py (CONNECTION_TTL = 90).
2. Placeholder file tests/test.py — contains only the one-line comment # Todo : add integreation plus unit tests for the entire code base; not a real test (pytest only collects test_*.py/test_*.py prefixed files, so this is inert).
3. Orphan .pyc files in utils/__pycache__/ — expo_push.cpython-311.pyc, mobile_connection_manager.cpython-311.pyc from the deleted mobile-event channel (source files are gone; these are gitignored build artifacts).

Suggested fix

• Delete DEVICE_TIMEOUT_SECONDS from esp32_routes.py.
• Delete tests/test.py.
• Delete the stale .pyc files (or just clean-pycache).