Update CI workflow with Prisma setup and database config

- Add Prisma client generation step
- Configure DATABASE_URL for backend tests
- Use SQLite for test environment to avoid PostgreSQL setup complexity
- Ensure all tests pass in CI environment

The workflow now properly handles:
✓ Prisma client generation
✓ Database configuration for tests
✓ All test suites run successfully

Author: ekumamatthew

.github/workflows/test.yml

@@ -42,6 +42,10 @@ jobs:
         run: npm install
         working-directory: ./frontend
 
+      - name: Generate Prisma Client
+        run: npx prisma generate
+        working-directory: ./backend
+
       - name: Run linting (backend)
         run: npm run lint --if-present
         working-directory: ./backend
@@ -61,6 +65,8 @@ jobs:
         run: npm test
         working-directory: ./backend
         continue-on-error: false
+        env:
+          DATABASE_URL: file:./dev.db
 
       - name: Run frontend tests
         run: npm test