[MeshCore P3] M3 - Proactive segment resolver (conditional on M2)

[pskillen]

Parent

Part of #267. Milestone M3. Conditional on the M2 spike yielding a proven rule.

Goal

Populate MeshCorePathSegmentResolution.status=resolved only via proven rules.

Scope

• Resolver service updating resolutions on proven binding events / new mc_pubkey / resolver-version bump.
• manage.py backfill; idempotent; tests reject suffix/prefix/recency heuristics.
• Rollup enrichment: emit node / feeder edge kinds once segments resolve.

Acceptance criteria

• Resolved hops link to ObservedNode; unresolved stay unknown.
• Tests fail if heuristic matching is introduced without an ADR update.

Note

If M2 finds no proven rule, this milestone is skipped and the subsystem stays hash-only.