fix(shopinbit): defend against API contract drift

[sneurlax]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 10.00000% with 18 lines in your changes missing coverage. Please review.
✅ Project coverage is 4.86%. Comparing base (1196407) to head (4ca84ac).
⚠️ Report is 9 commits behind head on staging.

Files with missing lines	Patch %	Lines
lib/models/shopinbit/shopinbit_order_model.dart	22.22%	7 Missing ⚠️
lib/services/shopinbit/src/models/ticket.dart	0.00%	5 Missing ⚠️
lib/pages/shopinbit/shopinbit_ticket_detail.dart	0.00%	3 Missing ⚠️
lib/pages/shopinbit/shopinbit_tickets_view.dart	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           staging    #1322      +/-   ##
===========================================
- Coverage     4.86%    4.86%   -0.01%     
===========================================
  Files         1050     1050              
  Lines       107034   107153     +119     
===========================================
+ Hits          5208     5210       +2     
- Misses      101826   101943     +117     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.