feat: organisationsübergreifende Geräteliste (Kundenplattform-Admin)

Neuer Endpoint GET /api/v1/devices (alle Geräte, Organisationsname
gejoint) für den Admin-Bereich "Verwaltung -> Geräte".

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app.py

@@ -603,6 +603,41 @@ def fetch_devices_for_organization(organization_id: str):
                 for device_id, hostname, fingerprint, last_checkin in cur.fetchall()
             ]
 
+def fetch_all_devices():
+    """
+    Organisationsübergreifende Geräteliste für den Kundenplattform-Admin-
+    Bereich (Verwaltung -> Geräte) - Pendant zu fetch_devices_for_organization,
+    ohne Org-Filter, mit Organisationsname gejoint.
+    """
+
+    with get_database_connection() as conn:
+        with conn.cursor() as cur:
+            cur.execute(
+                """
+                SELECT d.id, d.hostname, d.device_fingerprint, d.agent_last_checkin,
+                       d.organization_id, o.name
+                FROM devices d
+                JOIN organizations o ON o.id = d.organization_id
+                ORDER BY o.name, d.hostname NULLS LAST, d.created_at
+                """
+            )
+            return [
+                {
+                    "id": str(device_id),
+                    "hostname": hostname,
+                    "device_fingerprint": fingerprint,
+                    "agent_last_checkin": (
+                        last_checkin.isoformat() if last_checkin is not None else None
+                    ),
+                    "organization_id": str(organization_id),
+                    "organization_name": organization_name,
+                }
+                for (
+                    device_id, hostname, fingerprint, last_checkin,
+                    organization_id, organization_name,
+                ) in cur.fetchall()
+            ]
+
 def fetch_organizations():
     with get_database_connection() as conn:
         with conn.cursor() as cur:
@@ -962,6 +997,18 @@ def get_organization_devices(
     return {"success": True, "devices": fetch_devices_for_organization(organization_id)}
 
 
+@app.get("/api/v1/devices")
+def list_all_devices(authorization: str | None = Header(default=None)):
+    if not require_service_token(authorization):
+        return {
+            "success": False,
+            "error": "unauthorized",
+            "message": "Fehlendes oder ungültiges Service-Token.",
+        }
+
+    return {"success": True, "devices": fetch_all_devices()}
+
+
 @app.get("/api/v1/organizations")
 def list_organizations(authorization: str | None = Header(default=None)):
     if not require_service_token(authorization):