Upgrade Grafana to 11.3.0, fix geomap bug, add Grid Singularity repos

- Upgrade Grafana from 10.2.0 to 11.3.0 (fixes ExecuteQuery panic with postgres plugin)
- Create complete dashboard with timeseries, table and geomap panels
- Clone Grid Singularity repos (gsy-e, gsy-framework, gsy-e-sdk)
- All panels now display data correctly

scripts/asset_location_server.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+"""Simple HTTP server that serves FlexMeasures asset locations as JSON."""
+import json
+import psycopg2
+from http.server import HTTPServer, BaseHTTPRequestHandler
+
+def get_assets():
+    conn = psycopg2.connect(
+        host="flexmeasures-db",
+        port=5432,
+        database="flexmeasures",
+        user="flexmeasures",
+        password="Digitribe972"
+    )
+    cur = conn.cursor()
+    cur.execute("""
+        SELECT g.name, g.latitude, g.longitude, gt.name as type 
+        FROM generic_asset g 
+        JOIN generic_asset_type gt ON g.generic_asset_type_id = gt.id 
+        ORDER BY gt.id, g.id
+    """)
+    rows = cur.fetchall()
+    cur.close()
+    conn.close()
+    return [{"name": r[0], "latitude": float(r[1]), "longitude": float(r[2]), "type": r[3]} for r in rows]
+
+class Handler(BaseHTTPRequestHandler):
+    def do_GET(self):
+        assets = get_assets()
+        self.send_response(200)
+        self.send_header("Content-Type", "application/json")
+        self.send_header("Access-Control-Allow-Origin", "*")
+        self.end_headers()
+        self.wfile.write(json.dumps(assets).encode())
+    
+    def log_message(self, format, *args):
+        pass
+
+if __name__ == "__main__":
+    server = HTTPServer(("0.0.0.0", 8888), Handler)
+    print("Asset location server running on port 8888")
+    server.serve_forever()