fix(ci): add prisma generate step to matrix CI workflow

tests/proxy_unit_tests/test_key_generate_prisma.py imports PrismaClient
at module level, which triggers a Prisma binary check. Without running
prisma generate first, all tests in that file ERROR at collection time
with "Unable to find Prisma binaries. Please run 'prisma generate' first."

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/test-litellm-matrix.yml

@@ -102,6 +102,10 @@ jobs:
         run: |
           cd enterprise && poetry run pip install -e . && cd ..
 
+      - name: Generate Prisma client
+        run: |
+          poetry run prisma generate --schema litellm/proxy/schema.prisma
+
       - name: Run tests - ${{ matrix.test-group.name }}
         run: |
           poetry run pytest ${{ matrix.test-group.path }} \