Add fetchTransactionHistory function

[MissBlue00]

Task

Add a fetchTransactionHistory function to retrieve transaction history via SEP-6.

Details

• Function signature: fetchTransactionHistory(params: HistoryParams): Promise<TransactionHistoryResult>
• Fetch transactions from anchor via SEP-6
• Support pagination for large result sets
• Filter by asset, date range, and status
• Add HistoryParams and TransactionHistoryResult interfaces

Test

Run pnpm --filter @stellar-pay/anchor-service build to verify no TypeScript errors.

[BigNathan1]

@BigNathan1 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I can resolve this issue accurately and precise within the hour. Please assign it to me

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[supremeproton02]

@supremeproton02 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I would like to work on this issue, kindly assign me to this issue. Thank you

ℹ️ Repo Maintainers: To accept this application, review their application or assign @supremeproton02 to this issue.