Increase default sandbox timeout to 30 minutes

[skrishnan22]

Summary

• Bump DEFAULT_CONFIG.max_time from 15m to 30m so new sessions get a 30-minute sandbox timeout by default.
• Applies to CLI config defaults, session directory fallbacks, and orchestrator session creation when no explicit max_time is provided.

Test plan

• pnpm --filter @codevil/shared test
• Start a session without --max-time and confirm max_time / max_session_time is 30m

Made with Cursor

[greptile-apps]

Greptile Summary

This PR increases the shared default sandbox session timeout from 15 minutes to 30 minutes.

• New CLI configurations inherit the 30-minute default.
• Session-directory and orchestrator fallback paths receive the same value.
• Explicit timeout settings remain unaffected.

Confidence Score: 5/5

The PR appears safe to merge with no identified correctness, security, or repository-rule issues.

The new duration is accepted by existing parsing and validation, reaches all relevant default session-creation paths, and preserves explicit user overrides.

Important Files Changed

Filename	Overview
packages/shared/src/config.ts	Updates DEFAULT_CONFIG.max_time to 30m, which is supported and consistently consumed by downstream session-creation paths.

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