Phase 13: Method Deprecation and Import Migration

Mark all old Avro Schema methods as deprecated and begin import statement migration across the codebase.

Scope: All packages migrated in Phases 2-12

Changes: Add @Deprecated annotations to all Avro Schema overloads, change import statements from org.apache.avro.Schema to org.apache.hudi.common.schema.HoodieSchema

Strategy: Module-by-module import migration, update IDE suggestions to prefer HoodieSchema, add compiler warnings for deprecated usage

Constraints: Keep deprecated methods functional during transition, maintain backward compatibility for external integrations

Files: All files modified in previous phases, update import statements systematically

Review the files modified in Phases 2-12 and inventory their org.apache.avro.Schema imports and Avro Schema overloads. Work module by module, preserving deprecated methods and backward compatibility while checking compiler warnings and IDE suggestions. Done means the scoped packages use HoodieSchema imports and deprecated APIs remain functional.

Written by the indexing model from the issue text.