[MeshCore P3] M6 - History / centrality API (node + routers)

[pskillen]

Parent

Part of #267. Milestone M6.

Goal

Longer-term history and important-router analytics over bucketed passive edges.

Scope

• GET /api/meshcore/path-tracing/nodes/<id>/ — node-centric path evidence.
• GET /api/meshcore/path-tracing/routers/ — centrality summary, computed per the M2 Postgres-vs-Neo4j decision.
• Document passive semantics (observed path weight, not traceroute success); unresolved hashes labelled as such.

Acceptance criteria

• Endpoints documented in OpenAPI; time-window + constellation filters supported.
• Wording never implies TR success/coverage.

Depends on

• M4 (graph) and/or M2 decision on compute location.