Capture real responses from all 32 REST endpoints + 1 WebSocket
message from the production MeshCore Analyzer instance. Fixtures
include nodes, packets, observers, channels, analytics, config,
and health endpoints with real IDs substituted.
Stored in proto/testdata/node-fixtures/ for Go port contract testing.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>