dev-api: add developer portal, OpenAPI spec, and Flatenbadet case study

- New /developers/ page with API docs, SDKs, pricing, use cases
- OpenAPI 3.0 spec for Orders, Missions, Photos, Analytics
- Case study: Glasskiosken i Flatenbadet — complete ROI analysis
- Updated /order/ with recurring missions and frequency dropdown

memory/projects/quixzoom.md

@@ -46,3 +46,18 @@
 ## 2026-07-14 09:45 UTC
 
 - `??` quixzoom-auth-core/
+
+<!-- memory-saver:bd6333919587bfaf -->
+## 2026-07-14 10:10 UTC
+
+- ` M` quixzoom-auth-core
+
+<!-- memory-saver:be863264f38ed08e -->
+## 2026-07-14 10:15 UTC
+
+- `??` quixzoom-payout-engine/
+
+<!-- memory-saver:04ef3325466b3185 -->
+## 2026-07-14 11:10 UTC
+
+- `??` quixzoom-audit-report.md