[14.0][FIX] delivery_mrw_no_info: handle None response in tracking states

[deeniiz]

No description provided.

[Copilot]

Pull request overview

This PR hardens the delivery_mrw_no_info override of MRW tracking-state retrieval so it can tolerate None responses from the upstream MRW request layer.

Changes:

• Add a fallback response structure when _original_get_tracking_states() returns None or has a None "Seguimiento" payload.
• Ensure "MensajeSeguimiento" is set to the expected “Busqueda correcta por Número de Albarán.” value and inject a synthetic “no info” tracking state.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.
✅ Project coverage is 50.37%. Comparing base (ba6ec84) to head (5a16895).
⚠️ Report is 5 commits behind head on 14.0.

Files with missing lines	Patch %	Lines
delivery_mrw_no_info/models/mrw_request.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             14.0     #887      +/-   ##
==========================================
- Coverage   50.37%   50.37%   -0.01%     
==========================================
  Files        1174     1174              
  Lines       20087    20089       +2     
  Branches     4267     4268       +1     
==========================================
  Hits        10119    10119              
- Misses       9734     9736       +2     
  Partials      234      234              

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