Complete Economic Observatory MVP (ADAPTIVE-WP-0002)

Add file-based Bubble, Stripe, and OpenRouter importers; usage attribution,
cost allocation, pricing simulator, credit wallets, and recommendations in the
dashboard API. Document whynot-design UI workflow and archive the finished
workplan with all ten tasks marked done.

projects/coulomb-pricing/data/imports/bubble-export.sample.json

@@ -0,0 +1,12 @@
+{
+  "exported_at": "2026-06-22",
+  "users": [
+    {
+      "bubble_id": "bubble-tegwick-001",
+      "username": "tegwick",
+      "status": "Active",
+      "created": "2025-11-03",
+      "plan": "flat-899-eur-monthly"
+    }
+  ]
+}