Add GAIA map workbench review candidate

[mdheller]

Summary

Adds an Agentplane MeshRush review candidate for the GAIA /map OSM workbench graph-view.

Scope

The candidate references:

• MeshRush GAIA map crystallization artifact;
• GAIA OSM map layer;
• OSM feature binding;
• GAIA world-model feature;
• H3 spatial coverage;
• advisory route graph;
• Sherlock evidence;
• OSM runtime-boundary records;
• SocioSphere governance lane.

Non-goals

• Does not execute routing.
• Does not dispatch work.
• Does not admit runtimes.
• Does not perform external actuation.
• Does not claim safety-critical navigation.

Boundary

The candidate is advisory and evidence-only. It can open evidence/governance review for the /map workbench, but any future runtime, navigation, dispatch, or safety transition must use an approval-required candidate.

Validation

Expected:

python3 scripts/validate_meshrush_candidate.py examples/meshrush/*.json

Closes #68.

[mdheller]

Implementation is complete and all visible workflows are green on head 693677462a2a5a84fc0cc5a92b56ac29975752ff: MeshRush Candidate, validate, lint, and ci all report success. Merge is currently blocked by branch protection reporting required status check lint as expected, despite the successful lint workflow run. Auto-merge is unavailable for this repository. Leaving PR open for required-check status reconciliation rather than bypassing branch protection.

[mdheller]

Triage note: PR appears functionally green, but merge is blocked by branch protection.

Observed:

• MeshRush Candidate: success
• validate: success
• ci: success
• lint: success as a workflow run
• combined commit status contexts: empty
• merge attempt rejected with: Required status check "lint" is expected.

This looks like a branch-protection/status-context mismatch rather than a code failure. Recommended fix: rerun or adjust the workflow/branch protection so the required lint context is published in the form branch protection expects, then merge.

Scope remains single-file evidence-only: examples/meshrush/gaia-map-workbench-review-candidate.v0.1.json.

[mdheller]

Repair/merge status: required lint status is now green, but the merge action was blocked by the tool safety layer rather than GitHub. This PR should be manually squash-merged or retried by another GitHub client with head SHA 0ef0c2a8ac00d1fe96f1672ebdfafbe3b7c2734f.