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_gururmm_server.md

@@ -1,14 +0,0 @@
----
-name: GuruRMM Server Layout
-description: SSH user, home directory, and deploy paths on 172.16.3.30
-type: reference
----
-
-SSH user is `guru`, NOT `mike`. Home directory is `/home/guru/`.
-
-- Repo: `/home/guru/gururmm`
-- Dashboard build: `cd /home/guru/gururmm/dashboard && npm run build`
-- Deploy: `sudo cp -r dist/* /var/www/gururmm/dashboard/`
-- Other dirs under `/home/guru/`: `guru-connect`, `guruconnect-server`, `backups`
-
-**Why:** First SSH session assumed `/home/mike/` — does not exist. Only users with home dirs are `guru` and `gitea-runner`.