[native_datafusion] [Spark SQL Tests] Parquet field ID matching not supported #3316

Summary

5 Spark SQL tests fail because native_datafusion doesn't respect Parquet field ID matching.

Failing Tests

• ParquetFieldIdIOSuite: "Parquet reads infer fields using field ids correctly"
• ParquetFieldIdIOSuite: "absence of field ids"
• ParquetFieldIdIOSuite: "SPARK-38094: absence of field ids: reading nested schema"
• ParquetFieldIdIOSuite: "multiple id matches"
• ParquetFieldIdIOSuite: "read parquet file without ids"
• ParquetFieldIdIOSuite: "global read/write flag should work correctly"

Root Cause

native_datafusion reads columns by name/position rather than Parquet field IDs, producing wrong results when spark.sql.parquet.fieldId.read.enabled is true.

Possible Fix

In CometScanRule.nativeDataFusionScan(), detect when spark.sql.parquet.fieldId.read.enabled is true and fall back to native_iceberg_compat.

Related

Discovered in CI for #3307 (enable native_datafusion in auto scan mode).