REFACTOR(repo): simplify project structure

- Move services/backend to langgraph/
- Move deploy/docker/Dockerfile to Dockerfile
- Remove deploy/, services/ folders
- Update GitHub Actions workflow paths
- Remove kustomization update logic (managed by K3S-HOME/applications)

.github/workflows/build.yml

@@ -15,13 +15,9 @@ jobs:
   build-and-push:
     runs-on: ubuntu-24.04-arm
     permissions:
-      contents: write
+      contents: read
       packages: write
 
-    outputs:
-      image-tag: ${{ steps.meta.outputs.tags }}
-      image-digest: ${{ steps.build.outputs.digest }}
-
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -48,96 +44,24 @@ jobs:
           images: ${{ env.REGISTRY }}/${{ steps.lowercase.outputs.repo }}
           tags: |
             type=ref,event=branch
-            type=ref,event=pr
             type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
-            type=sha,prefix={{branch}}-sha-,format=long
             type=raw,value=latest,enable={{is_default_branch}}
 
       - name: Build and push Docker image
         id: build
         uses: docker/build-push-action@v5
         with:
-          context: ./services/backend
-          file: ./deploy/docker/Dockerfile
+          context: ./langgraph
+          file: ./Dockerfile
           push: true
+          platforms: linux/arm64
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          platforms: linux/arm64
           cache-from: type=gha
           cache-to: type=gha,mode=max
 
-      - name: Extract SHA tag
-        id: extract-tag
-        run: |
-          TAGS="${{ steps.meta.outputs.tags }}"
-          echo "All tags:"
-          echo "$TAGS"
-          echo "---"
-
-          COMMIT_SHA="${{ github.sha }}"
-          BRANCH_NAME="${{ github.ref_name }}"
-          echo "Branch: $BRANCH_NAME"
-
-          SHA_TAG=$(echo "$TAGS" | grep -oE "${BRANCH_NAME}-sha-[a-f0-9]{40}" | head -n 1)
-
-          if [ -z "$SHA_TAG" ]; then
-            SHA_TAG=$(echo "$TAGS" | grep -oE "${BRANCH_NAME}-sha-[a-f0-9]+" | head -n 1)
-          fi
-
-          if [ -z "$SHA_TAG" ]; then
-            SHA_TAG="${BRANCH_NAME}-sha-$COMMIT_SHA"
-          fi
-
-          if [ -z "$SHA_TAG" ]; then
-            echo "ERROR: Failed to extract SHA tag"
-            exit 1
-          fi
-
-          echo "sha-tag=$SHA_TAG" >> $GITHUB_OUTPUT
-          echo "Extracted SHA tag: $SHA_TAG"
-
-      - name: Update kustomization with new image tag
-        run: |
-          git config --global user.name "github-actions[bot]"
-          git config --global user.email "github-actions[bot]@users.noreply.github.com"
-
-          SHA_TAG="${{ steps.extract-tag.outputs.sha-tag }}"
-          if [ -z "$SHA_TAG" ]; then
-            echo "ERROR: SHA_TAG is empty"
-            exit 1
-          fi
-
-          BRANCH_NAME="${{ github.ref_name }}"
-          if [ "$BRANCH_NAME" = "main" ]; then
-            OVERLAY="prod"
-          else
-            echo "Unknown branch: $BRANCH_NAME, skipping"
-            exit 0
-          fi
-
-          KUSTOMIZATION_FILE="deploy/k8s/overlays/$OVERLAY/kustomization.yaml"
-
-          if grep -q "images:" "$KUSTOMIZATION_FILE"; then
-            echo "Updating $KUSTOMIZATION_FILE with tag: $SHA_TAG"
-            sed -i "s|newTag:.*|newTag: $SHA_TAG|" "$KUSTOMIZATION_FILE"
-
-            if git diff --quiet; then
-              echo "No changes to commit"
-            else
-              git add "$KUSTOMIZATION_FILE"
-              git commit -m "Update $OVERLAY image to $SHA_TAG"
-              git push
-              echo "Kustomization updated with new image tag: $SHA_TAG"
-            fi
-          else
-            echo "$OVERLAY overlay uses base image, skipping kustomization update"
-          fi
-
       - name: Display image information
         run: |
           echo "Image built and pushed successfully!"
           echo "Image tags:"
           echo "${{ steps.meta.outputs.tags }}"
-          echo "SHA tag: ${{ steps.extract-tag.outputs.sha-tag }}"
-          echo "Digest: ${{ steps.build.outputs.digest }}"