test: restructure WepApiTest.http with three clearly separated users

The test file now creates three distinct users at the start:
  - admin (seeded, admin/admin)
  - curator (created by admin, accessLevel=1)
  - user (registered via /api/auth/register, accessLevel=0)

Each user has its own token variable (admin_token, curator_token,
user_token) and ID variable (admin_id, curator_id, user_id).

Sections are organized: Setup → Auth → User CRUD → Person →
Album → Tag → Asset → Stats → Settings → Cleanup.

All endpoints are tested at each appropriate authorization level:
admin (full access), curator (elevated access), user (own data only),
and anonymous (public data only).

Lactose/http-client.env.json

@@ -1,6 +1,8 @@
 {
   "dev": {
-    "rngUser": "preFilledValue",
-    "rngPassword": "preFilledValue"
+    "userName": "preFilledValue",
+    "userPwd": "preFilledValue",
+    "curatorName": "preFilledValue",
+    "curatorPwd": "preFilledValue"
   }
 }