v1.6.1: NSRT MK4 deconnexion — noise_status en base + ERR_NOISE dans error_flags

Meme modele que NPM: ecriture en base avec valeurs a 0 et noise_status=0xFF
si capteur deconnecte, flag ERR_NOISE (bit 5) dans byte 66 UDP, messages
explicites sur page capteurs et self-test.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

sqlite/create_db.py

@@ -140,10 +140,18 @@ cursor.execute("""
 CREATE TABLE IF NOT EXISTS data_NOISE (
     timestamp TEXT,
     current_LEQ REAL,
-    DB_A_value REAL
+    DB_A_value REAL,
+    noise_status INTEGER DEFAULT 0
 )
 """)
 
+# Add noise_status column to existing databases (migration)
+try:
+    cursor.execute("ALTER TABLE data_NOISE ADD COLUMN noise_status INTEGER DEFAULT 0")
+    print("Added noise_status column to data_NOISE")
+except:
+    pass  # Column already exists
+
 # Create a table MHZ19 (CO2 sensor)
 cursor.execute("""
 CREATE TABLE IF NOT EXISTS data_MHZ19 (