fix(benchmark): remove default agent timeout (#160)

## Description

Remove default agent timeout, was 30min

## Type of Change

<!-- Mark the relevant option with an 'x' -->

- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Documentation update
- [ ] Code refactoring
- [ ] Performance improvement
- [ ] Test updates

## Related Issues

<!-- Link to related issues using #issue-number -->
Closes #

## Changes Made

<!-- Describe the changes in detail -->

## Testing

<!-- Describe how you tested your changes -->

- [ ] I have tested locally
- [ ] I have added/updated tests
- [ ] All existing tests pass

## Checklist

- [ ] My code follows the code style of this project
- [ ] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have updated the documentation accordingly
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] New and existing unit tests pass locally with my changes
- [ ] Any dependent changes have been merged and published

## Screenshots (if applicable)

<!-- Add screenshots to help explain your changes -->

## Additional Notes

<!-- Any additional information that reviewers should know -->

Author: ross-rl

src/commands/benchmark-job/run.ts

@@ -326,7 +326,9 @@ export async function runBenchmarkJob(options: RunOptions) {
     const agentConfigs = parsedAgents.map((agent) => ({
       name: agent.name,
       modelName: agent.model,
-      timeoutSeconds: options.timeout ? parseInt(options.timeout, 10) : 1800,
+      timeoutSeconds: options.timeout
+        ? parseInt(options.timeout, 10)
+        : undefined,
       environmentVariables:
         Object.keys(providedEnvVars).length > 0 ? providedEnvVars : undefined,
       secrets,