docs(24-01): complete rate limiter factory and tiered public endpoint limits plan

- Add 24-01-SUMMARY.md with execution results
- Advance plan counter to 2/2
- Update progress to 50% (1 of 2 plans complete)
- Mark INFR-01 requirement complete
- Add factory pattern and tier decisions to STATE.md

.planning/STATE.md

@@ -2,15 +2,15 @@
 gsd_state_version: 1.0
 milestone: v2.1
 milestone_name: Public Discovery
-status: planning
-stopped_at: Phase 24 context gathered
-last_updated: "2026-04-09T13:13:39.015Z"
-last_activity: 2026-04-09 — Roadmap created for v2.1
+status: executing
+stopped_at: Completed 24-01-PLAN.md
+last_updated: "2026-04-10T08:08:39.065Z"
+last_activity: 2026-04-10
 progress:
   total_phases: 6
   completed_phases: 0
-  total_plans: 0
-  completed_plans: 0
+  total_plans: 2
+  completed_plans: 1
   percent: 0
 ---
 
@@ -21,14 +21,14 @@ progress:
 See: .planning/PROJECT.md (updated 2026-04-09)
 
 **Core value:** Help people make better gear decisions — discover what others use, compare real-world data, and see how a potential buy affects your setup before committing.
-**Current focus:** v2.1 Public Discovery — Phase 24: Public Access & Infrastructure
+**Current focus:** Phase 24 — public-access-infrastructure
 
 ## Current Position
 
-Phase: 24 of 26 (Public Access & Infrastructure)
-Plan: —
-Status: Ready to plan
-Last activity: 2026-04-09 — Roadmap created for v2.1
+Phase: 24 (public-access-infrastructure) — EXECUTING
+Plan: 2 of 2
+Status: Ready to execute
+Last activity: 2026-04-10
 
 Progress: [░░░░░░░░░░] 0%
 
@@ -60,6 +60,8 @@ v2.1 decisions:
 - Catalog data: open datasets + manufacturer specs + agent MCP enrichment — RESOLVED
 - Public-first: auth model rework before content features — RESOLVED
 - Phase 999.3 (Public Access Auth Model backlog item) is now Phase 24 — PROMOTED
+- [Phase 24-public-access-infrastructure]: createRateLimit factory pattern for configurable rate limiting per endpoint tier
+- [Phase 24-public-access-infrastructure]: Browse tier 120/min, detail tier 60/min — same limits for auth and anon users
 
 ### Pending Todos
 
@@ -71,6 +73,6 @@ None.
 
 ## Session Continuity
 
-Last session: 2026-04-09T13:13:39.013Z
-Stopped at: Phase 24 context gathered
-Resume file: .planning/phases/24-public-access-infrastructure/24-CONTEXT.md
+Last session: 2026-04-10T08:08:39.063Z
+Stopped at: Completed 24-01-PLAN.md
+Resume file: None