Update CI to store benchmark results in main and send to n8n from PR

.github/workflows/ci.yml

@@ -118,23 +118,57 @@ jobs:
       - name: Bench
         run: make bench
 
-      - name: Download previous benchmark data
+      - name: Set up cache
         uses: actions/cache@v3
         with:
           path: ./cache
           key: ${{ runner.os }}-benchmark
 
-      - name: Store benchmark result
-        uses: benchmark-action/github-action-benchmark@v1
-        if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
-        with:
-          name: Go Benchmark
-          tool: "go"
-          output-file-path: output.txt
-          external-data-json-path: ./cache/benchmark-data.json
-          fail-on-alert: false
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          comment-always: true
+      - name: Read previous benchmark result
+        if: github.event_name == 'pull_request'
+        id: prev-bench
+        run: |
+          if [ -f "./cache/bench_result.txt" ]; then
+            content=$(cat ./cache/bench_result.txt | jq -R -s .)
+            echo "PREV_BENCH_RESULT=$content" >> $GITHUB_OUTPUT
+
+            if [ -f "./cache/commit_hash.txt" ]; then
+              prev_commit=$(cat ./cache/commit_hash.txt)
+              echo "PREV_COMMIT=$prev_commit" >> $GITHUB_OUTPUT
+            else
+              echo "PREV_COMMIT=null" >> $GITHUB_OUTPUT
+            fi
+          else
+            echo "PREV_BENCH_RESULT=null" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Trigger n8n webhook
+        if: github.event_name == 'pull_request'
+        run: |
+          curr_bench=$(cat output.txt | jq -R -s .)
+
+          response=$(curl -f -X POST ${{ secrets.N8N_WEBHOOK_URL }} \
+          -H "Content-Type: application/json" \
+          -d '{
+            "repo": "${{ github.repository }}",
+            "pr_number": "${{ github.event.pull_request.number }}",
+            "commit_id": "${{ github.sha }}",
+            "prev_commit_id": "${{ steps.prev-bench.outputs.PREV_COMMIT }}",
+            "bench_result": curr_bench,
+            "prev_bench_result": ${{ steps.prev-bench.outputs.PREV_BENCH_RESULT }}
+          }' || echo "CURL_ERROR")
+
+          if [ "$response" = "CURL_ERROR" ]; then
+            echo "::error::Failed to trigger n8n webhook"
+            exit 1
+          fi
+
+      - name: Store benchmark result to cache
+        if: github.ref == 'refs/heads/main'
+        run: |
+          mkdir -p ./cache
+          cp output.txt ./cache/bench_result.txt
+          echo "${{ github.sha }}" > ./cache/commit_hash.txt
 
   complex-test:
     name: complex-test