fix(server): block V2 replacements until session cleanup completes

.github/workflows/ci.yml

@@ -86,6 +86,16 @@ jobs:
             !/.repos/
           sparse-checkout-cone-mode: false
 
+      # Blacksmith boots GitHub's Ubuntu runner image (gcc is usually present),
+      # but ACP process-tree live tests compile a small pthread fixture with `cc`
+      # and soft-skip when it is missing. Install build-essential so that path
+      # always runs in CI instead of silently no-oping.
+      - name: Install C toolchain for process-tree fixtures
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends build-essential
+          command -v cc
+
       - name: Setup Vite+
         uses: voidzero-dev/setup-vp@v1
         with:

.gitignore

@@ -27,6 +27,7 @@ squashfs-root/
 .vercel
 .gstack/
 .plans/
+/audits/
 dist-electron/
 .electron-runtime/
 .showcase/