Reorg: Move architecture decisions to docs/reference/

docs/architecture-decisions.md

@@ -1,54 +0,0 @@
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----
-
-## Decision: Management Services on TX1 (Not Command Center)
-
-**Date:** February 9, 2026  
-**Decision:** Deploy Phase 0.5 management services on TX1 Dallas instead of Command Center  
-**Status:** IMPLEMENTED
-
-### Rationale
-1. TX1 has 32 vCPU, 256GB RAM - currently 99% idle
-2. Simpler networking without Command Center routing
-3. Keeps Command Center clean for future Frostwall v2.0 DDoS protection
-4. Gitea migration to TX1 was seamless - proven success
-
-### Command Center Future Role
-Reserved for Phase 1 DDoS protection (GRE hub, Cloudflare integration)
-
----
-
-## Known Limitation: NC1 and TX1 Cannot Communicate Directly
-
-**Date:** February 9, 2026  
-**Status:** PERMANENT INFRASTRUCTURE CONSTRAINT
-
-NC1 Charlotte and TX1 Dallas are in different Breezehost datacenters with no direct routing.
-
-### Impact
-- Uptime Kuma on TX1 cannot monitor NC1 services
-- NC1 game servers excluded from TX1-based monitoring
-- Cross-datacenter communication requires public internet
-
-### Acceptance
-This is standard for multi-datacenter hosting and does not affect normal operations.
-
----
-
-## Decision: Three-Tier Documentation Architecture
-
-**Date:** February 9, 2026  
-**Decision:** Replace single BookStack with three-tier system
-
-| Tier | Technology | Domain | Access |
-|------|------------|--------|--------|
-| PUBLIC | MkDocs | docs.firefrostgaming.com | Anyone |
-| SUBSCRIBERS | Wiki.js + NextCloud | subscribers.firefrostgaming.com | Paid |
-| STAFF | Wiki.js | staff.firefrostgaming.com | Staff |
-
-### Rationale
-- Security boundaries per tier
-- Git-native public docs (MkDocs)
-- UI-friendly private docs (Wiki.js for Meg)
-- Appropriate tools for each use case
-