fix: add error handling for missing or malformed legal_sections.json [GSSOC'26]

[rudra3007-pro]

Description

Closes #617

Added try/except inside _load_legal_sections() to handle missing or
malformed JSON file with clear descriptive error messages instead of
generic Python errors.

Changes:

• Added FileNotFoundError with descriptive message
• Added json.JSONDecodeError catch raising ValueError with details

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)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• 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
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

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Project	Deployment	Actions	Updated (UTC)
nyaysetu	Ready	Preview, Comment	May 25, 2026 4:51am

[Mohitswamii]

Hi @viru0909-dev,

I noticed that issue #617 currently has an open PR linked to it. If additional improvements or refinements are needed for this issue, I would be happy to contribute.

Please let me know if I can work on it under GSSoC 2026. Thank you!

[rudra3007-pro]

@viru0909-dev Please review this PR

[rudra3007-pro]

@viru0909-dev Please review this PR

[rudra3007-pro]

@viru0909-dev Please review this PR