docs(phase968): roadmap, release notes, and module docs for v0.8.935

Co-authored-by: Cursor <[email protected]>

release_notes/RELEASE_v0.8.935.md

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+# Release v0.8.935 — Phase 968: Guild Mesh Multi-Guild Isolation Stats Extract + Guild Rail Keys
+
+**Date:** 2026-06-05
+**Type:** Non-breaking refactor — Guild mesh production hardening
+
+## Summary
+
+Phase 968 centralises multi-guild isolation diagnostics and federation aggregate construction
+into a new dedicated module (`guild-mesh-multi-guild-stats-build.js`). The four field key
+registries and three builders eliminate ad-hoc inline object literals from
+`exportMultiGuildSyncDiagnostics()` and `_federationSyncAggregateForView()`.
+Zero externally visible behavior changes.
+
+## New Module
+
+### `pearcord-platform/guild-mesh-multi-guild-stats-build`
+
+Exports:
+
+- **Key registries**: `meshMultiGuildDiagnosticsFieldKeys`, `meshMultiGuildPerGuildDiagnosticsFieldKeys`,
+  `meshGuildRailFieldKeys`, `meshFederationAggregateFieldKeys`
+- **Listers**: `listMeshMultiGuildDiagnosticsFieldKeys`, `listMeshMultiGuildPerGuildDiagnosticsFieldKeys`,
+  `listMeshGuildRailFieldKeys`, `listMeshFederationAggregateFieldKeys`
+- **Builders**: `buildMultiGuildDiagnosticsEnvelope`, `buildMultiGuildPerGuildDiagnosticsEntry`,
+  `buildFederationAggregateSnapshot`
+
+## Call-site Wiring (non-breaking)
+
+| File | Change |
+|------|--------|
+| `platform-partition-heal-orchestrator-mixin.js` | `exportMultiGuildSyncDiagnostics` uses `buildMultiGuildDiagnosticsEnvelope` + `buildMultiGuildPerGuildDiagnosticsEntry` |
+| `platform-federation-view-mixin.js` | `_federationSyncAggregateForView` uses `buildFederationAggregateSnapshot` |
+
+## Test Coverage
+
+- `smoke-guild-mesh-multi-guild-stats-build.cjs` — unit tests for all exports
+- `smoke-phase968-boot-gate.cjs` — structural verification + version check (0.8.935)
+- `smoke-agentctl-guild-mesh-multi-guild-stats-journey-stub.cjs` — agentctl integration stub
+- `test:mesh-stability-stats` — extended with multi-guild diag + federation aggregate key assertions
+- `test:gossip-rpc-pull-unit` — extended with all multi-guild builder unit assertions
+- `test:ci-phase968` — full CI bundle (all pass)
+
+## Version
+
+`0.8.934` → `0.8.935`