Initial commit: AirCoding V1.0.0 Alpha architecture baseline

Complete architecture document set with multi-model review remediation:
- Frozen interface contracts, runtime semantics, DB schemas
- Event/tool/error/provider registries
- Scheduler and main agent state machines
- C4 module/code views, solution architecture, baseline V1
- Multi-model review reports and joint assessment
- Phase-gate remediation complete (P0/P1/P2/UX resolved)
- Implementation plan with T-000A through T-045
- Reference folders kept as placeholders only

reference/atuin-18.16.1/.github/workflows/docker.yaml

@@ -0,0 +1,61 @@
+name: build-docker
+
+on:
+  push:
+    branches: [main]
+    tags:
+      - 'v*'
+
+jobs:
+  publish:
+    concurrency:
+      group: ${{ github.ref }}-docker
+      cancel-in-progress: true
+    permissions:
+      packages: write
+      contents: read
+      id-token: write
+
+    runs-on: depot-ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v6
+
+      - name: Get Repo Owner
+        id: get_repo_owner
+        run: echo "REPO_OWNER=$(echo ${{ github.repository_owner }} | tr '[:upper:]' '[:lower:]')" > $GITHUB_ENV
+
+      - uses: depot/setup-action@v1
+
+      - name: Login to container Registry
+        uses: docker/login-action@v3
+        with:
+          username: ${{ github.repository_owner }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+          registry: ghcr.io
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ env.REPO_OWNER }}/atuin
+          flavor: |
+            latest=false
+          tags: |
+            type=ref,event=branch
+            type=sha,prefix=
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+
+      - name: Build and push
+        uses: depot/build-push-action@v1
+        with:
+          push: true
+          platforms: linux/amd64,linux/arm64
+          file: ./Dockerfile
+          context: .
+          provenance: false
+          build-args: |
+            Version=${{ fromJSON(steps.meta.outputs.json).labels['org.opencontainers.image.version'] || 'dev' }}
+            GitCommit=${{ github.sha }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}