refactor(ports): standardize service ports to 8000-8017 range and update CORS configurations across all services

- Update CORS allow_origins in blockchain-node app.py and gossip relay.py to use new port logic (8000-8016)
- Update coordinator-api config.py and config_pg.py with standardized port ranges and service labels
- Update coordinator-api health check script from port 18000 to 8000
- Update geo_load_balancer.py to use configurable host/port (default 0.0.0.0:8017)
- Update agent_security.py sandbox

dev/gpu/gpu_exchange_status.py

@@ -49,7 +49,7 @@ except:
 # Check Blockchain
 print("\n3. ⛓️  Checking Blockchain Node...")
 try:
-    response = httpx.get("http://localhost:9080/rpc/head")
+    response = httpx.get("http://localhost:8003/rpc/head")
     if response.status_code == 200:
         data = response.json()
         print(f"   ✅ Blockchain Node active")
@@ -74,14 +74,14 @@ print("   curl http://localhost:8091/miners/list")
 print("\n   Get GPU details:")
 print("   curl http://localhost:8091/miners/localhost-gpu-miner")
 print("\n   Get blockchain info:")
-print("   curl http://localhost:9080/rpc/head")
+print("   curl http://localhost:8003/rpc/head")
 
 # Show Current Status
 print("\n6. 📈 Current System Status:")
 print("   ✅ GPU Miner: Running (systemd)")
 print("   ✅ GPU Registry: Running on port 8091")
 print("   ✅ Trade Exchange: Running on port 3002")
-print("   ✅ Blockchain Node: Running on port 9080")
+print("   ✅ Blockchain Node: Running on port 8003")
 
 print("\n" + "=" * 50)
 print("🎯 GPU is successfully integrated with the exchange!")

dev/gpu/gpu_miner_host.py

@@ -14,7 +14,7 @@ from datetime import datetime
 from typing import Dict, Optional
 
 # Configuration
-COORDINATOR_URL = os.environ.get("COORDINATOR_URL", "http://127.0.0.1:9080")
+COORDINATOR_URL = os.environ.get("COORDINATOR_URL", "http://127.0.0.1:8003")
 MINER_ID = os.environ.get("MINER_API_KEY", "miner_test")
 AUTH_TOKEN = os.environ.get("MINER_API_KEY", "miner_test")
 HEARTBEAT_INTERVAL = 15