core(claude): correctly setup repo and deps for claude code agent (#2858)

Author: ericallam

.github/workflows/claude.yml

@@ -30,6 +30,23 @@ jobs:
         with:
           fetch-depth: 1
 
+      - name: ⎔ Setup pnpm
+        uses: pnpm/action-setup@v4
+        with:
+          version: 10.23.0
+
+      - name: ⎔ Setup node
+        uses: buildjet/setup-node@v4
+        with:
+          node-version: 20.19.0
+          cache: "pnpm"
+
+      - name: 📥 Download deps
+        run: pnpm install --frozen-lockfile
+
+      - name: 📀 Generate Prisma Client
+        run: pnpm run generate
+
       - name: Run Claude Code
         id: claude
         uses: anthropics/claude-code-action@v1