fix(ci): add prisma generate step to unit-tests job

The unit-tests job was failing because it couldn't find the generated Prisma client.
Added prisma generate step before running unit tests to ensure the client is available.

.gitea/workflows/pr.yml

@@ -19,6 +19,11 @@ jobs:
       - name: Install dependencies
         run: bun install
 
+      - name: Generate Prisma client
+        run: bun x prisma generate
+        env:
+          DATABASE_URL: postgresql://user:pass@localhost:5432/dummy
+
       - name: Run unit tests
         run: bun test src/__tests__/unit/ src/__tests__/*.test.tsx src/__tests__/auth-simple.test.ts