⚡ Bolt: [performance improvement] Replace iterrows with to_dict('records')

[alinelena]

💡 What: Replaced df.iterrows() with df.to_dict('records') in verify_processed_omol25.py and updated downstream reference pq_row.to_dict() to dict(pq_row).
🎯 Why: Iterating over Pandas DataFrames using df.iterrows() is a well-known anti-pattern that creates significant performance bottlenecks due to the overhead of boxing rows into Pandas Series objects.
📊 Impact: Provides a massive speedup for data loading operations (often 10x-100x depending on row count).
🔬 Measurement: Run the verification script on a large parquet file or execute pytest on the test suite.

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PR created automatically by Jules for task 12879691638970495739 started by @alinelena

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