Add temperature compensation and webcam mic noise sensing

- Temperature: dynamic compensation using CPU temp (factor=1.85, calibrated for eye1)
- Noise: uses arecord from webcam mic instead of broken MEMS HAT mic
- Config: added sensors section for temp_factor and noise_device
- API: now returns raw_temp and cpu_temp alongside compensated temp

Calibration: 69°F actual ambient
🦊 Christmas Eve 2025

main.py

@@ -46,6 +46,7 @@ def load_config(config_path: str = "config.yaml") -> dict:
         "server": {"host": "0.0.0.0", "port": 8767},
         "database": {"path": "enviro_history.db", "retention_hours": 168},
         "sampling": {"interval_seconds": 60},
+        "sensors": {"temp_compensation_factor": 1.85, "noise_device": "default"},
         "lcd": {"enabled": True, "brightness": 0.5, "default_message": "🦊 Vixy"},
         "mock_mode": False
     }
@@ -154,7 +155,12 @@ async def lifespan(app: FastAPI):
     mock_mode = config.get("mock_mode", False)
     
     # Initialize components
-    sensors = get_sensors(mock_mode=mock_mode)
+    sensor_config = config.get("sensors", {})
+    sensors = get_sensors(
+        mock_mode=mock_mode,
+        temp_factor=sensor_config.get("temp_compensation_factor", 1.85),
+        noise_device=sensor_config.get("noise_device", "default")
+    )
     db = await get_database(
         db_path=config["database"]["path"],
         retention_hours=config["database"]["retention_hours"]