feat: intégration capteur CO2 MH-Z19

- Scripts MH-Z19/get_data.py (lecture standalone) et write_data.py (écriture SQLite)
- Table data_MHZ19, config MHZ19, cleanup et service systemd (120s)
- Web UI : carte test sensors, checkbox admin, boutons database + CSV download
- SARA_send_data_v2.py non modifié (sera fait dans un second temps)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

sqlite/create_db.py

@@ -136,6 +136,14 @@ CREATE TABLE IF NOT EXISTS data_NOISE (
 )
 """)
 
+# Create a table MHZ19 (CO2 sensor)
+cursor.execute("""
+CREATE TABLE IF NOT EXISTS data_MHZ19 (
+    timestamp TEXT,
+    CO2 REAL
+)
+""")
+
 # Commit and close the connection
 conn.commit()
 conn.close()

sqlite/flush_old_data.py

@@ -22,6 +22,7 @@ timestamp_table
 data_MPPT
 data_NOISE
 data_WIND
+data_MHZ19
 
 '''
 
@@ -124,7 +125,8 @@ def main():
             "data_envea",
             "data_WIND", 
             "data_MPPT", 
-            "data_NOISE"
+            "data_NOISE",
+            "data_MHZ19"
         ]
 
         # Check which tables actually exist

sqlite/set_config.py

@@ -50,6 +50,7 @@ config_entries = [
     ("BME280", "1", "bool"),
     ("MPPT", "0", "bool"),
     ("NOISE", "0", "bool"),
+    ("MHZ19", "0", "bool"),
     ("modem_version", "XXX", "str"),
     ("device_type", "nebuleair_pro", "str"),
     ("language", "fr", "str"),