ci: prebuild zero-config runtime

Author: ITSGJY

.github/workflows/issue-576-validation.yml

@@ -88,10 +88,14 @@ jobs:
       - uses: Swatinem/rust-cache@v2
         with:
           shared-key: issue-576-zero-config
+      - name: Build exact Server and Runner binaries
+        run: cargo build --locked -p webcodex --bin webcodex-server -p webcodex-runner --bin webcodex-runner
       - name: Zero-config runtime E2E
         shell: bash
         env:
           E2E_TIMEOUT_SECS: "600"
+          E2E_SERVER_BIN: ${{ github.workspace }}/target/debug/webcodex-server
+          E2E_RUNNER_BIN: ${{ github.workspace }}/target/debug/webcodex-runner
         run: bash scripts/e2e_zero_config_ws.sh
 
   shared-key-e2e: