Add benchmark test suite with GitHub Actions workflow

Run performance benchmarks (indexing, search, filter, analysis) on synthetic
log files up to 1M lines. Results are posted to the Actions job summary.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: ozgesolidkey

.github/workflows/benchmark.yml

@@ -0,0 +1,43 @@
+name: Benchmark
+
+on:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  benchmark:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Run benchmark
+        run: npm run benchmark 2>&1 | tee benchmark-output.txt
+
+      - name: Post benchmark results to summary
+        if: always()
+        run: |
+          echo '## Benchmark Results' >> $GITHUB_STEP_SUMMARY
+          echo '' >> $GITHUB_STEP_SUMMARY
+          echo '```' >> $GITHUB_STEP_SUMMARY
+          grep -A 100 'LOGAN BENCHMARK RESULTS' benchmark-output.txt >> $GITHUB_STEP_SUMMARY || echo 'No results table found' >> $GITHUB_STEP_SUMMARY
+          echo '```' >> $GITHUB_STEP_SUMMARY
+
+      - name: Upload benchmark output
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: benchmark-results
+          path: benchmark-output.txt
+          retention-days: 30

package.json

@@ -11,8 +11,9 @@
     "dev": "npm run build && electron .",
     "watch": "tsc -w",
     "typecheck": "tsc --noEmit",
-    "test": "vitest run",
-    "test:watch": "vitest",
+    "test": "vitest run --exclude src/tests/benchmark.test.ts",
+    "test:watch": "vitest --exclude src/tests/benchmark.test.ts",
+    "benchmark": "vitest run src/tests/benchmark.test.ts --reporter verbose --no-file-parallelism",
     "package": "npm run build && electron-builder --mac",
     "package:win": "npm run build && electron-builder --win",
     "package:linux": "npm run build && electron-builder --linux",