fix(ci): fix performance-benchmarking.yml YAML parse error

The workflow failed at GitHub Actions validation (0s, no jobs created)
because the multi-line git commit message at lines 262-265 had content
at column 1, which YAML interpreted as new mappings instead of the
run block continuation.

Also:
- Add job-level outputs declaration for performance-benchmarks job
- Add step id for check-gates so outputs can be referenced downstream
- Simplify commit message to single line to avoid YAML escaping issues

Co-Authored-By: Terraphim AI <noreply@anthropic.com>

Author: AlexMikhalev

.github/workflows/performance-benchmarking.yml

@@ -35,6 +35,9 @@ jobs:
     name: Performance Benchmarks
     runs-on: ubuntu-latest
     timeout-minutes: 30
+    outputs:
+      slo-compliance: ${{ steps.check-gates.outputs.slo-compliance }}
+      performance-gates-passed: ${{ steps.check-gates.outputs.performance-gates-passed }}
 
     steps:
     - name: Checkout code
@@ -140,6 +143,7 @@ jobs:
         fi
 
     - name: Check performance gates
+      id: check-gates
       run: |
         # Check if benchmark results meet performance requirements
         if [ -f "benchmark-results/*/benchmark_results.json" ]; then
@@ -259,9 +263,6 @@ jobs:
         git config --global user.email 'github-actions[bot]@users.noreply.github.com'
 
         git add benchmark-results/baseline.json
-        git commit -m "chore: update performance baseline
-
-Auto-updated from CI run: ${{ github.run_id }}
-SLO Compliance: ${{ needs.performance-benchmarks.outputs.slo-compliance }}%" || echo "No changes to commit"
+        git commit -m "chore: update performance baseline [run ${{ github.run_id }}]" || echo "No changes to commit"
 
         git push origin main