feat(memory): migrate openclawd vaults into collective layout

MEMORY.md

@@ -21,3 +21,12 @@
 ## 群体查询准则
 - 所有群体结论必须可追溯到：`branch + commit_hash + synced_at + source_path + scope`。
 - 查询一致性顺序固定：`sync git -> qmd update/embed -> query`。
+
+## Migration Snapshot (2026-03-10)
+- openclawd memory imported into:
+  - `shared/long-term/decisions/openclawd-infra-baseline.md`
+  - `shared/long-term/projects/openclawd-memory-index.md`
+  - `shared/long-term/projects/openclawd-project-status.md`
+  - `shared/long-term/lessons/openclawd-ops-lessons.md`
+- task tracking: `tasks/openclawd-migration-2026-03/`
+- group retrieval should use remote memory-gateway only.