feature: a minimal v1 backend implemented for treatments feature.

backend/package.json

@@ -41,7 +41,6 @@
     "@nestjs/swagger": "^11.2.6",
     "@nestjs/throttler": "^6.5.0",
     "@prisma/client": "^6.19.2",
-    "prisma": "^6.19.2",
     "adminjs": "^7.8.17",
     "axios": "^1.13.5",
     "bcrypt": "^6.0.0",
@@ -54,10 +53,12 @@
     "express-formidable": "^1.2.0",
     "express-session": "^1.19.0",
     "helmet": "^8.1.0",
+    "multer": "^2.1.1",
     "passport": "^0.7.0",
     "passport-jwt": "^4.0.1",
     "passport-local": "^1.0.0",
     "pg": "^8.18.0",
+    "prisma": "^6.19.2",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.1",
     "styled-components": "^6.3.11",
@@ -73,6 +74,7 @@
     "@types/express": "^5.0.0",
     "@types/express-session": "^1.18.2",
     "@types/jest": "^30.0.0",
+    "@types/multer": "^2.1.0",
     "@types/node": "^22.10.7",
     "@types/pg": "^8.16.0",
     "@types/react": "^19.2.14",