Add delivery and supplier HTTP APIs with expanded response docs.

Wire store-backed CRUD for goods receipts and suppliers, and teach the API doc generator to expand $ref/allOf/array samples so route markdown shows full JSON shapes.

docs/api/routes/auth/login.md

@@ -24,7 +24,12 @@ Login successful; `token` cookie set
 ```json
 {
   "message": "Login successful",
-  "user": { … }
+  "user": {
+    "id": 1,
+    "email": "user@example.com",
+    "selectedCompanyId": 1,
+    "picture": "…"
+  }
 }
 ```