chore: update logo to fill avatar space better

.github/workflows/backport.yaml

@@ -0,0 +1,36 @@
+name: Backport
+
+on:
+  pull_request_target:
+    types: [closed]
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  backport:
+    name: Backport
+    runs-on: ${{ vars.RUNNER || 'ubuntu-latest' }}
+    timeout-minutes: 10
+    if: >
+      github.event.pull_request.merged == true &&
+      contains(toJSON(github.event.pull_request.labels), 'backport/')
+    steps:
+      - uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
+        with:
+          egress-policy: audit
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+        with:
+          fetch-depth: 0
+
+      - uses: korthout/backport-action@d07416681cab29bf2661702f925f020aaa962997 # v3.4.1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          label_pattern: "^backport/(.+)$"
+          pull_description: |
+            Backport of #${pull_number} to `${target_branch}`.
+
+            Original PR: #${pull_number}
+            ---
+            ${pull_description}

.github/workflows/ci.yaml

@@ -301,7 +301,7 @@ jobs:
   test-bench:
     name: Benchmark Tests
     runs-on: ${{ vars.RUNNER || 'ubuntu-latest' }}
-    timeout-minutes: 10
+    timeout-minutes: 15
     needs: changes
     if: needs.changes.outputs.go == 'true'
     steps:
@@ -315,9 +315,51 @@ jobs:
           go-version: ${{ env.GO_VERSION }}
           cache: true
 
-      - name: Run benchmark tests
+      - name: Install benchstat
+        shell: bash -Eeuo pipefail {0}
+        run: go install golang.org/x/perf/cmd/benchstat@latest
+
+      - name: Restore baseline benchmarks
+        uses: actions/cache/restore@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        with:
+          path: bench-baseline.txt
+          key: bench-baseline-${{ runner.os }}-${{ hashFiles('go.sum') }}
+          restore-keys: bench-baseline-${{ runner.os }}-
+
+      - name: Run benchmarks
         shell: bash -Eeuo pipefail -x {0}
-        run: go test ./internal/... -bench=. -benchmem -run='^$' -timeout=5m
+        run: |
+          go test ./internal/... -bench=. -benchmem -run='^$' \
+            -count=5 -timeout=10m | tee bench-current.txt
+
+      - name: Compare with baseline
+        shell: bash -Eeuo pipefail {0}
+        run: |
+          if [[ -f bench-baseline.txt ]]; then
+            benchstat bench-baseline.txt bench-current.txt | tee bench-comparison.txt
+            {
+              echo "## Benchmark Comparison"
+              echo '```'
+              cat bench-comparison.txt
+              echo '```'
+            } >> "$GITHUB_STEP_SUMMARY"
+          else
+            echo "No baseline found; comparison will be available after the first main push."
+            echo "## Benchmark Results" >> "$GITHUB_STEP_SUMMARY"
+            echo "No baseline yet. One will be established on the next merge to main." >> "$GITHUB_STEP_SUMMARY"
+          fi
+
+      - name: Promote current run as baseline (main only)
+        if: github.ref == 'refs/heads/main' && github.event_name == 'push'
+        shell: bash -Eeuo pipefail {0}
+        run: cp bench-current.txt bench-baseline.txt
+
+      - name: Save baseline (main only)
+        if: github.ref == 'refs/heads/main' && github.event_name == 'push'
+        uses: actions/cache/save@0057852bfaa89a56745cba8c7296529d2fc39830 # v4.3.0
+        with:
+          path: bench-baseline.txt
+          key: bench-baseline-${{ runner.os }}-${{ hashFiles('go.sum') }}
 
   test-integration:
     name: Integration Tests

.github/workflows/release.yaml

@@ -10,9 +10,10 @@ concurrency:
   cancel-in-progress: false
 
 permissions:
+  actions: read     # For SLSA provenance
   contents: write
   packages: write
-  id-token: write  # For cosign keyless signing
+  id-token: write   # For cosign keyless signing
 
 env:
   GO_VERSION: "1.26"
@@ -25,6 +26,9 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/')
     runs-on: ubuntu-latest
     timeout-minutes: 30
+    outputs:
+      hashes: ${{ steps.hash.outputs.hashes }}
+      digest: ${{ steps.build.outputs.digest }}
     steps:
       - uses: step-security/harden-runner@9af89fc71515a100421586dfdb3dc9c984fbf411 # v2.19.4
         with:
@@ -60,6 +64,12 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: Generate provenance subjects
+        id: hash
+        shell: bash -Eeuo pipefail {0}
+        run: |
+          echo "hashes=$(cat goreleaser-dist/checksums.txt | base64 -w0)" >> "$GITHUB_OUTPUT"
+
       - name: Build and push multi-arch image
         uses: docker/build-push-action@f9f3042f7e2789586610d6e8b85c8f03e5195baf # v7.2.0
         id: build
@@ -166,3 +176,33 @@ jobs:
           VERSION="${VERSION#v}"
           cosign sign --yes \
             ${{ env.REGISTRY }}/${{ github.repository_owner }}/charts/attune:${VERSION}
+
+  # SLSA Level 3 provenance for GoReleaser binary artifacts.
+  # Runs as a reusable workflow (required for non-forgeable provenance).
+  provenance:
+    name: Binary Provenance
+    needs: [release]
+    permissions:
+      actions: read
+      id-token: write
+      contents: write
+    uses: slsa-framework/slsa-github-generator/.github/workflows/generator_generic_slsa3.yml@f7dd8c54c2067bafc12ca7a55595d5ee9b75204a # v2.1.0
+    with:
+      base64-subjects: "${{ needs.release.outputs.hashes }}"
+      upload-assets: true
+
+  # SLSA Level 3 provenance for the container image.
+  container-provenance:
+    name: Container Provenance
+    needs: [release]
+    permissions:
+      actions: read
+      id-token: write
+      packages: write
+    uses: slsa-framework/slsa-github-generator/.github/workflows/generator_container_slsa3.yml@f7dd8c54c2067bafc12ca7a55595d5ee9b75204a # v2.1.0
+    with:
+      image: ghcr.io/${{ github.repository }}
+      digest: ${{ needs.release.outputs.digest }}
+      registry-username: ${{ github.actor }}
+    secrets:
+      registry-password: ${{ secrets.GITHUB_TOKEN }}

CONTRIBUTING.md

@@ -230,6 +230,16 @@ chore: update controller-runtime to v0.24.1
 - Add table-driven tests for new logic
 - Use `meta.SetStatusCondition()` for condition management
 
+## Backporting Fixes to Release Branches
+
+When a fix merged to `main` should also go into a stable release branch,
+add a `backport/<branch>` label to the PR (e.g., `backport/release-0.1`).
+A GitHub Actions workflow will automatically cherry-pick the merge commit
+and open a backport PR targeting that release branch.
+
+If the cherry-pick has conflicts, the backport PR is created with conflict
+markers for manual resolution.
+
 ## Code of Conduct
 
 This project follows the [CNCF Code of Conduct](https://github.com/cncf/foundation/blob/main/code-of-conduct.md).