ci(bench): Add 10-minute time limit to random_access benchmarks

Add --time-limit 600 (10 minutes) flag to random_access benchmark runs in both
bench.yml and bench-pr.yml workflows. This ensures all targets (Vortex, Lance,
Parquet) run for the same duration, providing fair comparison despite different
performance characteristics.

The time limit is conditionally applied only to random_access benchmarks,
leaving other benchmarks (like compress) unchanged.

Author: claude

.github/workflows/bench-pr.yml

@@ -84,7 +84,11 @@ jobs:
         env:
           RUST_BACKTRACE: full
         run: |
-          target/release_debug/${{ matrix.benchmark.id }} -d gh-json -o ${{ matrix.benchmark.id }}.json
+          if [ "${{ matrix.benchmark.id }}" = "random_access" ]; then
+            target/release_debug/${{ matrix.benchmark.id }} -d gh-json -o ${{ matrix.benchmark.id }}.json --time-limit 600
+          else
+            target/release_debug/${{ matrix.benchmark.id }} -d gh-json -o ${{ matrix.benchmark.id }}.json
+          fi
 
       - name: Setup AWS CLI
         if: github.event.pull_request.head.repo.fork == false

.github/workflows/bench.yml

@@ -85,7 +85,11 @@ jobs:
         env:
           RUST_BACKTRACE: full
         run: |
-          target/release_debug/${{ matrix.benchmark.id }} -d gh-json -o ${{ matrix.benchmark.id }}.json --formats parquet,lance,vortex
+          if [ "${{ matrix.benchmark.id }}" = "random_access" ]; then
+            target/release_debug/${{ matrix.benchmark.id }} -d gh-json -o ${{ matrix.benchmark.id }}.json --formats parquet,lance,vortex --time-limit 600
+          else
+            target/release_debug/${{ matrix.benchmark.id }} -d gh-json -o ${{ matrix.benchmark.id }}.json --formats parquet,lance,vortex
+          fi
 
       - name: Setup AWS CLI
         uses: aws-actions/configure-aws-credentials@v5