Handle ping requests in Orbit MCP server

Abdullah Aymanrequested to merge
gitlab-community/gitlab-org/gitlab:orbit-mcp-ping-handler into master

What does this MR do?

POST /api/v4/orbit/mcp answered ping requests with HTTP 404 and JSON-RPC error -32601 Method not found. The Model Context Protocol specification requires the server to reply with an empty result ({}).

  • Add McpHandlers::Ping handler that returns an empty hash {}
  • Register ping in JSONRPC_METHOD_HANDLERS
  • Add unit spec for McpHandlers::Ping
  • Add request spec asserting HTTP 200 and empty result {}

References

Relates to #633038 (closed)

Issue #634954 (closed)

Edited by Abdullah Ayman

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