[BUG]: fetchContributors, fetchIssues, and fetchPulls crash with "TypeError: data is not iterable" when GitHub API returns non-array objects

Start in src/services/github.js, reviewing fetchWithCache() around lines 55-83 and the fetchContributors(), fetchIssues(), and fetchPulls() pagination logic around lines 101-135. Reproduce the issue with disabled-issue, empty, restricted, or 204-response repositories, then verify the pipeline completes without JSON or iterable errors and returns empty results where appropriate.

Bug Description

In src/services/github.js, fetchContributors(), fetchIssues(), and fetchPulls() spread the response from fetchWithCache() directly into an array using all.push(...data).

However, several GitHub API endpoints return non-array JSON objects or 204 No Content responses under valid conditions:

• Querying issues for repositories where issues are disabled returns { "message": "Issues are disabled in this repository" }.
• Querying contributors for empty repositories returns { "message": "Git Repository is empty." } or HTTP 204 No Content.
• Querying restricted repositories returns warning/error payload objects.

When data is a non-array object, all.push(...data) throws an uncaught JavaScript error:
TypeError: data is not iterable (or SyntaxError: Unexpected end of JSON input), causing the data fetching pipeline to crash and stall.

Where the Bug Occurs

• src/services/github.js (lines 55-83): fetchWithCache attempts res.json() on 204 No Content responses without checking status.
• src/services/github.js (lines 101-135): fetchContributors(), fetchIssues(), and fetchPulls() execute all.push(...data) without validating Array.isArray(data).

Expected Behavior

1. fetchWithCache() should handle 204 No Content responses gracefully (e.g. returning []).
2. fetchContributors(), fetchIssues(), and fetchPulls() should check if (Array.isArray(data)) before spreading into all.push(...data), and break gracefully if data is not an array.

Steps to Reproduce

1. Run explore() on an organization that has repositories with disabled issues or empty repositories.
2. Observe the browser console.
3. The fetch pipeline encounters TypeError: data is not iterable and fails to complete analytics aggregation.

Note

Please do not post AI-generated spam or generic template comments on this issue.

Logs and Screenshots

No response

Environment Details

No response

Impact

High - Major feature is broken

Code of Conduct

• I have joined the Discord server and will post updates there
• I have searched existing issues to avoid duplicates
• I am ready to submit a pr for this issue