fix rlm bash timeout

[snimu]

Description

The sub-LLM call timeout for bash (but not for python) was hardcoded; this PR changes it to respect the user settings.

Type of Change

• 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
• Test improvement

Testing

• All existing tests pass when running uv run pytest locally.
• New tests have been added to cover the changes

Checklist

• My code follows the style guidelines of this project as outlined in AGENTS.md
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

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Note

Low Risk
Low risk: a small change that replaces a hardcoded HTTP timeout with an environment-configured value, affecting only sub-LLM/root-tool calls from the Bash worker helper.

Overview
Fixes the Bash RLM worker’s root-tool HTTP proxy call to respect the configured sub-LLM timeout instead of using a hardcoded 300s.

_RLM_BASH_TOOL_HELPER_SCRIPT now reads RLM_SUB_LLM_TIMEOUT into SUB_LLM_TIMEOUT and uses it for urllib.request.urlopen(..., timeout=SUB_LLM_TIMEOUT), aligning Bash behavior with the Python worker’s configurable timeout.

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