🐛 fix(matrix-mana-bot): resolve QEMU emulation failure in CI

- Build matrix-mana-bot only for linux/amd64 (arm64 fails due to QEMU)
- Move pnpm overrides for cpu-features and ssh2 to root package.json
- These native deps cause illegal instruction errors under QEMU emulation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.github/workflows/ci.yml

@@ -1276,7 +1276,8 @@ jobs:
         with:
           context: .
           file: services/matrix-mana-bot/Dockerfile
-          platforms: linux/amd64,linux/arm64
+          # Note: arm64 disabled due to QEMU emulation issues with native dependencies
+          platforms: linux/amd64
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           cache-from: type=gha