🔧 Fix health checks: Use IPv4 address + Add debugging

🌐 Network Fix:
- Change localhost to 127.0.0.1 for all health check URLs
- Prevents IPv6 resolution issues in CI environment
- Ensures consistent IPv4 connectivity to container

🔍 Debugging Improvements:
- Check if container is running with docker ps
- Show recent container logs before health checks
- Better troubleshooting information for failures

📋 Updated Endpoints:
- http://127.0.0.1:8080/health
- http://127.0.0.1:8080/docs
- http://127.0.0.1:8080/stations
- http://127.0.0.1:8080/metrics

✅ Should resolve curl connection failures to localhost

.gitea/workflows/release.yml

@@ -210,10 +210,10 @@ jobs:
           sleep 30
 
           echo "🔍 Running health checks against local container..."
-          
+
           # Check if container is running
           docker ps | grep ping-river-monitor-test || echo "⚠️ Container not found in docker ps"
-          
+
           # Check container logs for any startup issues
           echo "📋 Recent container logs:"
           docker logs --tail 10 ping-river-monitor-test || true