docs: mark Model-Tier Routing DONE

docs/ROADMAP.org

@@ -376,16 +376,16 @@ Unified control plane for hooks, cron, and complexity-based routing.
 - Rule-based tier classifier (overrideable via ~*tier-classifier*~)
 
 **** TODO Context Manager (project scoping)
+
+**** DONE Model-Tier Routing (cost optimization) 
+CLOSED: [2026-05-03 Sun 16:00]
 :PROPERTIES:
-:ID:       id-a10ed34e-9f37-4a15-b499-46672c00d951
+:ID:       id-model-tier-routing
 :CREATED:  [2026-05-02 Sat 23:00]
 :END:
-Stack-based context with ~push-context~ / ~pop-context~.
-Path resolution relative to current context.
-Memory scope: ~:scope~ property on memory-objects (memex/session/project).
-Implement lazy-loading proxies for large-scale memory traversal.
-
-**** TODO Model-Tier Routing (cost optimization)
+:LOGBOOK:
+- State "DONE" from "TODO" [2026-05-03 Sun 16:00]
+:END:
 Extend ~*model-selector*~ for quadrant-based routing with per-slot provider cascades.
 - Privacy filter (local-only for @personal content) — top priority
 - Quadrant tagging (foreground/background × probabilistic/deterministic)