Regenerate tiny TPC-H data with decimals

[bdice]

Summary

• regenerate the committed SF0.01 TPC-H Parquet fixture using decimal columns
• keep the fixture aligned with the existing decimal TPC-H table schemas
• refresh the generated metadata

Root cause

The committed tiny TPC-H files still stored monetary and quantity columns as DOUBLE, while the table schemas declared those columns as DECIMAL(15,2). Registering the decimal schemas over the float fixture caused GPU integration failures from physical/logical type mismatches.

Impact

Local and lightweight integration runs now exercise the same decimal TPC-H types as CI instead of silently using the older float fixture.

Validation

• verified all nine expected columns are decimal128(15,2) and no fixture columns are floating-point
• regenerated Presto DDL from the Parquet files and confirmed it matches the committed TPC-H schemas
• python -m pytest -q benchmark_data_tools/tests/decimal_conversion_test.py
• ran all 21 Presto GPU TPC-H integration queries locally: 21 passed

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