fix(ci): also checkout pilot-protocol/policy (transitive replace)

Author: teovl

.github/workflows/ci.yml

@@ -36,6 +36,12 @@ jobs:
           repository: pilot-protocol/handshake
           path: handshake
 
+      - name: Checkout policy
+        uses: actions/checkout@v4
+        with:
+          repository: pilot-protocol/policy
+          path: policy
+
       - uses: actions/setup-go@v5
         with:
           go-version: '1.25'