Change Dockerfile ordering

.beans/nuzlocke-tracker-yz9t--optimize-backend-dev-dockerfile-layer-caching.md

@@ -0,0 +1,11 @@
+---
+# nuzlocke-tracker-yz9t
+title: Optimize backend dev Dockerfile layer caching
+status: completed
+type: task
+priority: normal
+created_at: 2026-02-13T14:45:23Z
+updated_at: 2026-02-13T14:47:48Z
+---
+
+Seed data changes (11MB in src/app/seeds/) invalidate the pip install layer because COPY src/ comes before RUN pip install -e. Fix by creating a minimal package stub before pip install, then copying full source after.