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/feedback_gururmm_agent_parity.md

@@ -1,16 +0,0 @@
----
-name: feedback_gururmm_agent_parity
-description: "Add feature X to the agent" means all three platforms (Windows + Linux + macOS) in the same change — no exceptions
-metadata:
-  type: feedback
----
-
-"Add feature X to the agent" means Windows + Linux + macOS. All three in the same change.
-
-**Why:** Mike stated this explicitly 2026-05-15. Delivering Windows-only and leaving Linux/macOS for later is not acceptable — it's the same as not finishing the task.
-
-**How to apply:** When implementing any agent feature:
-- If the implementation differs by platform, write all three variants.
-- If a real implementation is not feasible on a platform yet, add a working stub + `// TODO(platform): <os> — <reason>` in the same commit.
-- A silent no-op without a stub and TODO is treated as a bug.
-- See `.claude/CODING_GUIDELINES.md` "GuruRMM Agent — Platform Parity" for the full matrix and known gaps.