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/project_cascades_billing.md

@@ -1,14 +0,0 @@
----
-name: project-cascades-billing
-description: "Cascades of Tucson Syncro billing — prepaid block customer, rate TBD"
-metadata: 
-  node_type: memory
-  type: project
-  originSessionId: d91f202e-ddd5-46d7-b674-f848eb78aa8e
----
-
-Cascades of Tucson (Syncro customer_id: 20149445) is a prepaid block customer. As of 2026-05-20 the block had ~37.5 hrs remaining (38.5 minus 1hr for ticket #32304).
-
-**Block rate:** Not yet confirmed — $175/hr is the standard non-block remote rate, NOT the Cascades block rate. Ask Mike before billing future Cascades tickets.
-
-**How to apply:** Always check prepay_hours before billing. Invoices post at $0.00 with hours deducted by quantity. Confirm block rate with Mike before setting price_retail.