feat(gateway): add configuration file

Add config.json with gateway ID, MQTT broker settings and GATT UUIDs.
Avoids hardcoding environment-specific values in source code.

gateway/check_uuid.py

@@ -1,13 +0,0 @@
-import asyncio
-from bleak import BleakScanner
-
-async def scan():
-    print("Scan en cours (10 secondes)...")
-    devices = await BleakScanner.discover(timeout=10.0, return_adv=True)
-    for address, (device, adv) in devices.items():
-        if device.name and "Djelal" in device.name:
-            print(f"\n{device.name} | {address}")
-            print(f"  Service UUIDs : {adv.service_uuids}")
-            print(f"  Local name    : {adv.local_name}")
-
-asyncio.run(scan())

gateway/config.json

@@ -0,0 +1,15 @@
+{
+  "gateway_id": "gateway_lausanne_01",
+  "mqtt": {
+    "broker": "localhost",
+    "port": 1883
+  },
+  "ble": {
+    "service_uuid": "ef680100-9b35-4933-9b10-52ffa9740042",
+    "characteristics": {
+      "temperature": "ef680201-9b35-4933-9b10-52ffa9740042",
+      "co2":         "ef680204-9b35-4933-9b10-52ffa9740042",
+      "humidity":    "ef680203-9b35-4933-9b10-52ffa9740042"
+    }
+  }
+}

gateway/scan.py

@@ -1,10 +0,0 @@
-import asyncio
-from bleak import BleakScanner
-
-async def scan():
-	print("Scan BLE en cours (5 secondes)...")
-	devices = await BleakScanner.discover(timeout=5.0)
-	for d in devices:
-		print(f"{d.name} | {d.address}")
-
-asyncio.run(scan())