feat: Combined v2 Fixes - Enums, Null Safety, and ID Alias

[ArthurFreeb]

Combined v2 Fixes: Enums, Null Safety, and ID Alias

This PR combines the changes from three separate PRs to provide a single, comprehensive update that addresses multiple v2 filter improvements:

Included Changes

1. Enum Support (from #99)

• Added support for enum values in filter queries
• Allows both quoted and unquoted enum symbols to be parsed and evaluated correctly
• Introduces a new EnumSymbolLiteral AST node
• Updates parser and evaluator logic to handle enums
• Extends test coverage to verify enum filtering functionality

2. Null Safety Improvements (from #100)

• Enhanced null safety in the filter evaluator
• Improved handling of nullable properties throughout the evaluation chain
• Better error handling for null reference scenarios

3. ID Alias Fix (from #101)

• Fixed issues with property aliases, particularly for ID fields
• Improved property mapping to handle both standard and aliased property names correctly
• Ensures proper resolution of property paths when aliases are used

Related PRs

This PR combines the following individual PRs:

• feat: v2 Enums #99: feat: v2 Enums
• fix: v2 null safety #100: fix: v2 null safety
• fix: v2 id alias #101: fix: v2 id alias

Testing

All changes have been tested together and include comprehensive test coverage for:

• Enum filtering with various status values
• Null safety scenarios with nested properties
• Property alias resolution, especially for ID fields

The individual PRs remain available if you prefer to review and merge them separately.

[Jamess-Lucass]

Going to close this PR in favour of multiple smaller ones that tackle each feature individually. As the Id alias feature is not required