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_dataforth_email.md

@@ -1,13 +0,0 @@
----
-name: Dataforth email infrastructure
-description: Dataforth uses M365 for email; the Exchange server on 172.16.x.x / neptune.acghosting.com is NOT Dataforth's — it belongs to ACG's own infrastructure
-type: project
-originSessionId: 7034be43-1464-4085-b765-dc1226b1f8e0
----
-Dataforth's email runs on Microsoft 365 (sysadmin@dataforth.com, tenant in vault at `clients/dataforth/m365.sops.yaml`).
-
-The Exchange server at `neptune.acghosting.com` / `67.206.163.124` listed in the vault under `clients/dataforth/neptune-exchange.sops.yaml` is **not** part of Dataforth's infrastructure — do not use it for Dataforth email workflows.
-
-**Why:** Mike corrected this during pipeline notification work (2026-04-22). The Exchange entry is an ACG-side server, not Dataforth's.
-
-**How to apply:** For any Dataforth email sending, SMTP basic auth is disabled on the tenant. Must use OAuth2 — either XOAUTH2 over SMTP or (preferred) Microsoft Graph API `POST /v1.0/users/sysadmin@dataforth.com/sendMail` with a client_credentials token. Entra app is in vault at `clients/dataforth/m365.sops.yaml` under `credentials.entra-app`. Verify `Mail.Send` application permission is granted before use.