Fix Orion-LD: Add source to @context + PATCH with full payload

- ORION_CONTEXT now includes source definition (uri.fiware.org)
- PATCH /entities/{id}/attrs now sends full entity (with @context)
- Orion-LD requires @context even in PATCH requests
- This fixes 400 Bad Request errors on update

simulator.py

@@ -168,6 +168,7 @@ for stype, locs in SENSOR_LOCATIONS.items():
 # Orion-LD ne peut pas résoudre raw.githubusercontent.com — utiliser uri.etsi.org uniquement
 ORION_CONTEXT = [
     "https://uri.etsi.org/ngsi-ld/v1/ngsi-ld-core-context.jsonld",
+    {"source": "https://uri.fiware.org/ngsi-ld/default-context/source"}
 ]
 
 # Mapping sensor type → Smart Data Model type NGSI-LD
@@ -527,13 +528,12 @@ def publish_orion(sid: str, sensor: dict) -> bool:
         if e.code != 409:
             print(f"  ⚠️  Orion-LD → {e.code}: {e.read().decode()[:200]}")
             return False
-    # 2. Déjà existant (409) → PATCH sur les attributs (sans id/type/@context)
+    # 2. Déjà existant (409) → PATCH sur les attributs (avec @context complet requis par Orion-LD)
     try:
-        # PATCH ne doit contenir que les attributs (pas id/type/@context)
+        # Orion-LD exige @context même dans le PATCH
-        attrs = {k: v for k, v in entity.items() if k not in ("id", "type", "@context")}
         eid = urllib.parse.quote(entity['id'], safe='')
         patch_url = f"{base}/entities/{eid}/attrs"
-        req2 = urllib.request.Request(patch_url, data=json.dumps(attrs).encode(),
+        req2 = urllib.request.Request(patch_url, data=body,
                                      headers={"Content-Type": "application/ld+json", "Accept": "application/ld+json"}, method="PATCH")
         with urllib.request.urlopen(req2, timeout=8) as resp2:
             print(f"  🌐 Orion-LD: ✅ (HTTP {resp2.status} updated)")