Add type hints and missing docstring for code quality improvements

[hemant-rgb]

Summary

This PR adds missing type hints and docstrings to improve code quality, readability, and maintainability without modifying any existing behavior.

Changes Made

• Added missing docstring to request_post() in vulnerablecode.py.
• Added type hints to helper functions in views.py:
  • purldb_is_configured
  • render_as_yaml
  • render_size
  • fields_have_no_values
  • do_not_disable
• Added return type annotations to:
  • poll_until_success()
  • run_command_safely()

Why

• Improves static analysis (Ruff ANN rules)
• Enhances IDE autocompletion & navigation
• Increases code consistency across the project
• No functional changes; safe improvement

Signed-off-by

Hemant Machiwar hemantmachiwar76@gmail.com

[tdruez]

These changes don't appear to be linked to any agreed-upon issues.
Structural changes to the codebase (like adding type hints) should be proposed and discussed separately before implementation. This helps us maintain consistency and ensures the team is aligned on the approach.