chore(memory): consolidate scattered feedback/project/reference files

Compressed memory store 104 -> 71 files via four passes:

- Syncro: 19 scattered feedback_syncro_* files merged into 3 rule files
  (api/billing/workflow) + an on-demand feedback_syncro_history.md for
  incident detail, quotes, and tech/product ID tables.
- Four near-duplicate merges: Howard paste-safety, Pluto build server,
  Howard backend deferral, IX server access (ssh+tailscale).
- Per-cluster rule/state/history split applied to GuruConnect (2->1),
  Dataforth (3->2), Cascades (7->3), GuruRMM (13->3).
- New reference_resource_map.md: single auto-loaded cheatsheet for
  "do I have access to X and how do I connect from this machine?"
- MEMORY.md rewritten to match the new layout.

Health: broken backlinks 8->7, overlap clusters 12->5, orphans 17->0.

.claude/memory/reference_gitea_api_credential.md

@@ -9,4 +9,4 @@ For Gitea API operations as Howard (create/merge PRs, delete branches, etc.), au
 
 Do NOT use `infrastructure/gururmm-server.sops.yaml credentials.password` for Gitea — that is the `guru` server SSH/sudo password for 172.16.3.30. It was rejected by the Gitea API for a write (PR merge) on 2026-05-31; the gitea-howard credential is the correct one. The two are separate accounts; don't assume they're interchangeable.
 
-Related: [[reference_gururmm_server]] (the guru SSH/server password), [[reference_coord_messages_api_shape]].
+Related: [[reference_gururmm]] (the guru SSH/server password), [[reference_coord_messages_api_shape]].