fix: Resolve CI failures for v0.7.0 release

Fix lint errors:
- Remove unused Optional import from gitleaks workflow
- Remove unused logging import from trufflehog activities

Fix documentation broken links:
- Update workspace-isolation links to use /docs/ prefix in resource-management.md
- Update workspace-isolation links to use /docs/ prefix in create-workflow.md

Fix benchmark dependency:
- Add fuzzforge-sdk installation to benchmark workflow
- SDK is required for bench_comparison.py import

All CI checks should now pass.

.github/workflows/benchmark.yml

@@ -46,6 +46,7 @@ jobs:
           python -m pip install --upgrade pip
           pip install -e ".[dev]"
           pip install pytest pytest-asyncio pytest-benchmark pytest-benchmark[histogram]
+          pip install -e ../sdk  # Install SDK for benchmarks
 
       - name: Run benchmarks
         working-directory: ./backend