chore: git cache cleanup

.github/workflows/benchmark.yml

@@ -1,79 +0,0 @@
-name: Go Benchmark
-
-on:
-  pull_request:
-  push:
-    branches:
-      - main
-  workflow_dispatch:
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.event_name }}-${{ github.event.workflow_run.head_branch || github.ref }}
-  cancel-in-progress: true
-
-env:
-  GO_VERSION: '1.26.0'
-  GOTOOLCHAIN: auto
-
-# Minimal permissions at workflow level; write permissions granted at job level for push only
-permissions:
-  contents: read
-
-jobs:
-  benchmark:
-    name: Performance Regression Check
-    runs-on: ubuntu-latest
-    if: ${{ github.event_name == 'workflow_dispatch' || github.event_name == 'pull_request' || github.event.workflow_run.conclusion == 'success' }}
-    # Grant write permissions for storing benchmark results (only used on push via step condition)
-    # Note: GitHub Actions doesn't support dynamic expressions in permissions block
-    permissions:
-      contents: write
-      deployments: write
-    steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
-        with:
-          ref: ${{ github.event.workflow_run.head_sha || github.sha }}
-
-      - name: Set up Go
-        uses: actions/setup-go@4b73464bb391d4059bd26b0524d20df3927bd417 # v6
-        with:
-          go-version: ${{ env.GO_VERSION }}
-          cache-dependency-path: backend/go.sum
-
-      - name: Run Benchmark
-        working-directory: backend
-        env:
-          CHARON_ENCRYPTION_KEY: ${{ secrets.CHARON_ENCRYPTION_KEY_TEST }}
-        run: go test -bench=. -benchmem -run='^$' ./... | tee output.txt
-
-      - name: Store Benchmark Result
-        # Only store results on pushes to main - PRs just run benchmarks without storage
-        # This avoids gh-pages branch errors and permission issues on fork PRs
-        if: github.event.workflow_run.event == 'push' && github.event.workflow_run.head_branch == 'main'
-        # Security: Pinned to full SHA for supply chain security
-        uses: benchmark-action/github-action-benchmark@4e0b38bc48375986542b13c0d8976b7b80c60c00 # v1
-        with:
-          name: Go Benchmark
-          tool: 'go'
-          output-file-path: backend/output.txt
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          auto-push: true
-          # Show alert with commit comment on detection of performance regression
-          # Threshold increased to 175% to account for CI variability
-          alert-threshold: '175%'
-          comment-on-alert: true
-          fail-on-alert: false
-          # Enable Job Summary
-          summary-always: true
-
-      - name: Run Perf Asserts
-        working-directory: backend
-        env:
-          PERF_MAX_MS_GETSTATUS_P95: 500ms
-          PERF_MAX_MS_GETSTATUS_P95_PARALLEL: 1500ms
-          PERF_MAX_MS_LISTDECISIONS_P95: 2000ms
-          CHARON_ENCRYPTION_KEY: ${{ secrets.CHARON_ENCRYPTION_KEY_TEST }}
-        run: |
-          echo "## 🔍 Running performance assertions (TestPerf)" >> "$GITHUB_STEP_SUMMARY"
-          go test -run TestPerf -v ./internal/api/handlers -count=1 | tee perf-output.txt
-          exit "${PIPESTATUS[0]}"