Build transaction enrichment action / flow (with Synth API)

[zachgoll]

Overview

The primary goal of this issue is to build a backend flow that reads through a user's list of transactions, calls the Synth API for each to fetch enhanced merchant logos and data and more:

https://docs.synthfinance.com/reference/enrich-transaction

Scoping

This issue does not have hard requirements and still needs to be scoped. Some ideas for this include:

• Nature: this should most likely be a background job
• Trigger: to start, we should probably require user action to trigger this flow. The main reason for this is because this will consume API credits and we don't yet have a good UI for users to manage their data providers and API usage.
  • User can manually trigger enrichment for a single transaction
  • User can manually trigger enrichment for selected (or all) transactions
• UI/UX: this should probably be an "action" provided in the transaction row menu, similar to other actions like "edit", "delete", etc.