feat!: port mutexbot actions to rust and add isolation channels

.github/workflows/mutexbot.yml

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+name: MutexBot Container Image
+
+on:
+  pull_request:
+    branches:
+      - main
+    paths:
+      - "mutexbot/**"
+  push:
+    branches:
+      - main
+    paths:
+      - "mutexbot/**"
+    tags:
+      - "mutexbot-v*.*.*"
+
+permissions:
+  contents: read
+
+env:
+  DOCKERHUB_REPO: neondatabase/dev-actions
+
+jobs:
+  build:
+    runs-on: ${{ fromJson(format('["self-hosted", "{0}"]', matrix.platform == 'linux/arm64' && 'small-arm64' || 'small')) }}
+    outputs:
+      digest_arm64: ${{ steps.export_digest.outputs.digest_arm64 }}
+      digest_amd64: ${{ steps.export_digest.outputs.digest_amd64 }}
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm64
+    steps:
+      - name: Fetch mutexbot folder
+        uses: actions/checkout@v4
+        with:
+          sparse-checkout: mutexbot
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.DOCKERHUB_REPO }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.NEON_DOCKERHUB_USERNAME }}
+          password: ${{ secrets.NEON_DOCKERHUB_PASSWORD }}
+
+      - name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@v6
+        with:
+          context: mutexbot
+          platforms: ${{ matrix.platform }}
+          labels: ${{ steps.meta.outputs.labels }}
+          outputs: type=image,name=${{ env.DOCKERHUB_REPO }},push-by-digest=true,name-canonical=true,push=true
+
+      - name: Export digest
+        id: export_digest
+        run: |
+          arch="$(echo -n ${{ matrix.platform }} | sed -e 's/linux\///')"
+          digest="${{ steps.build.outputs.digest }}"
+          echo "digest_${arch}=${digest#sha256:}" >> "$GITHUB_OUTPUT"
+
+  merge:
+    runs-on: ["self-hosted", "small"]
+    needs:
+      - build
+    steps:
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.NEON_DOCKERHUB_USERNAME }}
+          password: ${{ secrets.NEON_DOCKERHUB_PASSWORD }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.DOCKERHUB_REPO }}
+          tags: |
+            # branch event
+            type=ref,enable=true,priority=600,prefix=mutexbot-,suffix=,event=branch
+            # pull request event
+            type=ref,enable=true,priority=600,prefix=mutexbot-pr-,suffix=,event=pr
+            # tags event
+            type=match,pattern=mutexbot-v(.*)
+
+      - name: Create manifest list and push
+        run: |
+          docker buildx imagetools create \
+            $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            ${{ env.DOCKERHUB_REPO }}@sha256:${{ needs.build.outputs.digest_arm64 }} \
+            ${{ env.DOCKERHUB_REPO }}@sha256:${{ needs.build.outputs.digest_amd64 }}
+
+      - name: Inspect image
+        run: docker buildx imagetools inspect ${{ env.DOCKERHUB_REPO }}:${{ steps.meta.outputs.version }}

mutexbot/.gitignore

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+/target