feat(dependency): Improve Python site-packages scanning

[JigyasuRajput]

Description

Fixes #4330

This PR enhances the scanning of the site-packages directory by improving dependency resolution and addressing limitations of the previous approach.

Changes:

• Replaced METADATA-based scanning with a more robust dependency resolution mechanism.
• Implemented an iterative depth-first search (DFS) approach for resolving package dependencies, ensuring better handling of indirect dependencies.
• Improved cycle detection to prevent infinite loops in dependency resolution.
• Refactored the dependency graph logic for better efficiency and maintainability.

Why this is needed:

• The previous method relied on reading the METADATA file, which might not always provide complete dependency information.
• Unlike requirements.txt scanning (which uses pip), site-packages scanning did not properly track indirect dependencies.
• These changes ensure a more accurate and complete vulnerability scan of installed Python packages.

Testing:

• All unit tests pass successfully.
• The new dependency resolution logic was validated using sample package structures.

[JigyasuRajput]

Hey everyone!
If anyone has time, I'd appreciate a review on this PR. Thanks!