docs(33): add summaries for plans 03 and 04 (wave 2 complete)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.planning/phases/33-currency-system/33-04-SUMMARY.md

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+# Plan 33-04 Summary
+
+**Status:** Complete
+**Completed:** 2026-04-13
+
+## What Was Built
+
+Community price submission system with ownership validation and per-market aggregation, plus setup totals currency metadata.
+
+### Key Changes
+- Created community-price.service.ts with validateOwnership, submitCommunityPrice, getCommunityPriceStats
+- Created community-prices route (GET public stats, POST requires auth + ownership)
+- Aggregation uses PERCENTILE_CONT(0.5) for median with HAVING COUNT >= 3
+- Ownership validation: user must have item linked to globalItemId
+- Added priceCurrency to setup service (getSetupWithItems and getSetupWithItemsById)
+
+### Key Files Created/Modified
+- `src/server/services/community-price.service.ts` — Community price logic
+- `src/server/routes/community-prices.ts` — Community price API
+- `src/server/index.ts` — Route registration
+- `src/server/services/setup.service.ts` — priceCurrency in item lists
+
+## Self-Check: PASSED
+- [x] Community price service with ownership validation
+- [x] Median aggregation with 3-report minimum
+- [x] Setup items include priceCurrency