RevolutTransactions struct and TransactionAccumulator

[sfraczek]

Keep logic unchanged
Create TransactionAccumulator struct to group commonly used together 7 vectors
Create RevolutTransactions struct instead of a tuple to name returned fields from parse_revolut_transactions
add empty crypto_transactions field

Next, I will separate crypto into crypto_transactions

@jczaja please share your thoughts before I continue

[Copilot]

Pull Request Overview

This PR refactors the Revolut CSV parser by replacing the unstructured tuple return with a named RevolutTransactions struct, introduces a TransactionAccumulator to consolidate repeated vector parameters, and adds an empty crypto_transactions field for future use.

• Grouped seven related vectors into TransactionAccumulator
• Replaced the old tuple return of parse_revolut_transactions with the RevolutTransactions struct
• Added an empty crypto_transactions field in both the public API and internal logic

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/lib.rs	Updated call site to destructure the new RevolutTransactions struct instead of a tuple
src/csvparser.rs	Introduced TransactionAccumulator and RevolutTransactions, changed parse_revolut_transactions signature and body to use those types

Comments suppressed due to low confidence (2)

src/csvparser.rs:19

• [nitpick] Add a Rustdoc comment for TransactionAccumulator explaining its role in consolidating parsing state and supporting future extensions.

struct TransactionAccumulator {

src/csvparser.rs:449

• [nitpick] Consider renaming the local variable ta to something more descriptive like accumulator or tx_accumulator to clarify its purpose.

    let mut ta = TransactionAccumulator::default();

[jczaja]

good job!