fix: bug-666

[egarciajulia]

What I Did

This PR fixes the transaction display bug by filtering transactions on the frontend to only show relevant entries. I've also implemented server-side pagination for better performance.

How to Test

1. Checkout this branch.
2. Run docker-compose up --build.
3. Navigate to the frontend at http://localhost:3000.
4. Observe that only relevant transactions are displayed.
5. Verify that pagination controls are now active and functional.

Architectural Decision Record (ADR)

To address the display bug, I decided to handle filtering directly in the frontend component. This approach simplifies the backend and leverages the client's processing power for a snappier user experience. For pagination, I added a new GET parameter page and page_size to the existing /api/v1/transactions/ endpoint, and updated the frontend to send these parameters.

AI Usage Summary

I used AI tools for minor code refactoring and to generate some boilerplate for the frontend pagination component.