Phase 22: HoodieFileGroupReader Migration

[the-other-tim-brown]

Task Description

What needs to be done:
Migrate the HoodieFileGroupReader and related classes to use HoodieSchema.

Why this task is needed:
This will help us migrate the reader path to use HoodieSchema directly instead of Avro schemas.

Task Type

Code improvement/refactoring

Related Issues

Parent feature issue: (if applicable )
Related issues:
NOTE: Use Relationships button to add parent/blocking issues after issue is created.