Update AssessmentProbe for new capabilities #8
Description
Update AssessmentProbe to map new categories and entries from mcp-agent-assessment:
- 13 new categories (11 MCP capabilities + 2 A2A extensions)
- 3 new summary fields (specVersion, ap2Version, erc8004ServiceUrl)
- Error fallback updated
- 1 new test + 4 existing tests updated
Depends on: FlowMCP/mcp-agent-assessment