perf: not compile .venv and .uv-cache

[fatelei]

Description

fix #705

Type of Change

• Bug fix
• New feature
• Refactor
• Performance improvement
• Other

Essential Checklist

Testing

• I have tested the changes locally and confirmed they work as expected
• I have added unit tests where necessary and they pass successfully

Bug Fix (if applicable)

• I have used GitHub syntax to close the related issue (e.g., Fixes #123 or Closes #123)

Additional Information

Please provide any additional context that would help reviewers understand the changes.

[gemini-code-assist]

Code Review

This pull request updates the Python pre-compilation logic to exclude .venv and .uv-cache directories by default using the -x flag. It also introduces logic to merge user-provided exclusion patterns from configuration. The review feedback highlights several improvements: escaping literal dots in the regex to prevent matching any character, using strings.Fields for more robust argument parsing, and ensuring that multiple user-provided exclusion patterns are accumulated rather than overwritten.