Optimizer is trying to use streamable-http for SSE servers in Kubernetes

[danbarr]

I'm running the latest mcp-optimizer 0.2.1 in K8s (deployed via the Helm chart). It's successfully indexing streamable-http servers, but I also have one SSE server running (oci-registry). This server fails to be indexed, and it seems the optimizer is trying to use the wrong connection type:

2025-12-22 20:16:19 [info     ] Using streamable-http client for workload 'oci-registry' [mcp_optimizer.mcp_client] normalized_url=http://mcp-oci-registry-proxy.toolhive-system.svc.cluster.local:8080/mcp original_url=http://mcp-oci-registry-proxy.toolhive-system.svc.cluster.local:8080/sse#oci-registry proxy_mode_field=streamable-http workload=oci-registry
2025-12-22 20:16:19 [info     ] Initializing MCP session for workload 'oci-registry' [mcp_optimizer.mcp_client] workload=oci-registry
2025-12-22 20:16:19 [error    ] MCP session error              [mcp_optimizer.mcp_client] error='MCP protocol error: Session terminated' workload=Workload(created_at='2025-12-19T23:01:11Z', group='demo-tools', labels={'demo.toolhive.stacklok.dev/vmcp-backend': 'true'}, name='oci-registry', package='ghcr.io/stackloklabs/ocireg-mcp/server:0.0.6', port=8080, proxy_mode='streamable-http', remote=False, status='running', status_context='MCP server is running', tool_type='mcp', tools=[], transport_type='sse', url='http://mcp-oci-registry-proxy.toolhive-system.svc.cluster.local:8080/sse#oci-registry')
2025-12-22 20:16:19 [warning  ] Failed to process workload 'oci-registry': MCP protocol error: Session terminated [mcp_optimizer.ingestion] error_type=WorkloadConnectionError workload_name=oci-registry workload_package=ghcr.io/stackloklabs/ocireg-mcp/server:0.0.6 workload_url=http://mcp-oci-registry-proxy.toolhive-system.svc.cluster.local:8080/sse#oci-registry
2025-12-22 20:16:19 [warning  ] Failed to process workload - see details above [mcp_optimizer.ingestion] error='MCP protocol error: Session terminated' workload_name=oci-registry workload_remote=False workload_url=http://mcp-oci-registry-proxy.toolhive-system.svc.cluster.local:8080/sse#oci-registry

Note the Using streamable-http client for workload 'oci-registry' even though transport_type='sse'. It seems to be detecting proxy_mode='streamable-http'; however proxy_mode isn't explicitly set on this workload and in any case is only relevant to stdio servers?