Normalizes scraped transaction amounts for credit-card scrapers.
Pure function: input arrays/objects are not mutated; output is a new array.
For non-credit-card banks the input is returned via a shallow copy with
the same transaction object identities preserved.
Normalizes scraped transaction amounts for credit-card scrapers.
Pure function: input arrays/objects are not mutated; output is a new array. For non-credit-card banks the input is returned via a shallow copy with the same transaction object identities preserved.