improved cron job: handle non-existent repo gracefully

[ZibanPirate]

• throw when getting non-OK HTTP responses.
• deferred project clean up to the end of cron even when project has no repos.
• correct the SPL-Router project info.

• Bug fix
• New feature
• Other

[Copilot]

Pull Request Overview

This PR adds error handling for HTTP fetch requests by checking the response status and throwing errors for non-successful requests. This fixes a bug where non-200 HTTP responses were incorrectly treated as successful operations.

• Adds response status validation using response.ok
• Implements error logging for failed requests
• Throws descriptive errors for failed fetch operations

Comments suppressed due to low confidence (1)

api/src/fetch/service.ts:53

• [nitpick] The error message could be more informative by including the HTTP status code. Consider changing to: Failed to fetch ${url}: ${response.status} ${response.statusText}

      throw new Error(`Failed to fetch ${url}: ${response.statusText}`);