[WIP] Ransack form search field value not persisted between requests when using alias

[Copilot]

• Analyze the issue: Form search field values not persisted when using ransack aliases
• Understand the root cause: read_attribute method in grouping.rb doesn't resolve aliases when looking up condition values
• Create a test that reproduces the issue
• Implement the fix to resolve aliases in read_attribute method
• Test the fix works correctly
• Verify no breaking changes to existing functionality

Fixes #689

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