Pi port: serial transport, addressed ESP-NOW bridge, port 80

- Run app on Raspberry Pi: serial to ESP32 bridge at 912000 baud, /dev/ttyS0
- Remove ESP-NOW/MicroPython-only code from src (espnow, p2p, wifi, machine/Pin)
- Transport: always send 6-byte MAC + payload; optional to/destination_mac in API and WebSocket
- Settings and model DB use project paths (no root); fix sys.print_exception for CPython
- Preset/settings controllers use get_current_sender(); template paths for cwd=src
- Pipfile: run from src, PORT from env; scripts for port 80 (setcap) and test
- ESP32 bridge: receive 6-byte addr + payload, LRU peer management (20 max), handle ESP_ERR_ESPNOW_EXIST
- Add esp32/main.py, esp32/benchmark_peers.py, scripts/setup-port80.sh, scripts/test-port80.sh

Made-with: Cursor

Pipfile

@@ -12,6 +12,7 @@ watchfiles = "*"
 requests = "*"
 selenium = "*"
 adafruit-ampy = "*"
+microdot = "*"
 
 [dev-packages]
 
@@ -21,4 +22,5 @@ python_version = "3.12"
 [scripts]
 web = "python /home/pi/led-controller/tests/web.py"
 watch = "python -m watchfiles 'python tests/web.py' src tests"
-install = "pipenv install"
+install = "pipenv install"
+run = "sh -c 'cd src && python main.py'"