Function needs_reprocessing 

pub fn needs_reprocessing(
    existing_hash: Option<&Option<String>>,
    new_hash: &str,
) -> ReprocessingDecision

Determines if a dataset needs reprocessing based on content hash comparison.

Arguments

• existing_hash - The stored content hash for this dataset (None if new dataset)
• new_hash - The computed content hash from the portal data

Returns

A ReprocessingDecision indicating whether embedding regeneration is needed and the classification of this sync operation.