Refactor duplicated API request logic in useEffect #535

Problem description
API request (axios.get) is duplicated inside the useEffect hook.

Expected Result

Use a reusable function to fetch contributor data.

Actual Result

The same API fetching logic appears twice (initial fetch and inside setInterval).

Proposed Solution

By Creating a function like fetchContributorData() and call it for both the initial load and interval to remove duplication and improve maintainability.

Benefits

1. Reduces code duplication
2. Improves code readability
3. Makes the component easier to maintain