feat: add user profile management with update and retrieval endpoints, enhance database setup for testing

compose.yml

@@ -50,6 +50,21 @@ services:
       - frontend
       - backend
 
+  db_test:
+    image: postgres:15-alpine
+    container_name: thoughts-db-test
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_PASSWORD: postgres
+      POSTGRES_DB: postgres
+    ports:
+      - "5434:5432"
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U postgres -d postgres"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
+
 volumes:
   postgres_data:
     driver: local