ci(repeat-recent-requests): replace http-request-action with curl

[marcalexiei]

• Swaps the third-party fjogeleit/http-request-action for a plain curl step in repeat-recent-requests.yml:
  the workflow only needs a POST with a timeout, so the action added no value.
• The request carries only what the endpoint reads. repeat-recent checks req.method and nothing else.
  So the action's JSON body and headers were never used.
  Each flag has a one-line comment explaining why it's there.
• Failure semantics are preserved: a >= 400 status or a connection failure still fails the job, and the response body and status are now logged even on failure.

Example run: https://github.com/marcalexiei/github-stats-extended/actions/runs/30751117550/job/91505220151

[vercel]

@marcalexiei is attempting to deploy a commit to the martin-mfg's projects Team on Vercel.

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