[token-server] Add function to get tx history after a given timestamp

Summary:
Add new function getHistoryAfterTimestamp to get chronik tx history after a given timestamp. Add a new script to call the function to support testing on mainnet.

Ref D15599 to see how this function will be used.

Test Plan: npm test

Reviewers: #bitcoin_abc, PiRK

Reviewed By: #bitcoin_abc, PiRK

Differential Revision: https://reviews.bitcoinabc.org/D15652