Fix checkout error handling: guard processDeliveryItem on success only

[sentry]

Summary

Fixes ANDROID-HQ

The Android app was unconditionally calling processDeliveryItem after checkout regardless of the HTTP response status. Additionally, processDeliveryItem contained a hardcoded throw new BackendAPIException, which caused every checkout attempt to capture an error event in Sentry (15,901 occurrences since March 2026).

Root Cause

1. In onResponse, when the checkout HTTP response was not successful (!success), the app still called processDeliveryItem.
2. In onFailure, processDeliveryItem was also called unconditionally.
3. processDeliveryItem itself contained throw new BackendAPIException("Failed to init delivery workflow") — a hardcoded throw that always triggered, causing the ANDROID-HQ Sentry issue.

Changes

• Guard processDeliveryItem on successful checkout only: In onResponse, only call processDeliveryItem when response.isSuccessful() is true. On failure, dismiss the dialog and finish the transaction with INTERNAL_ERROR status.
• Remove processDeliveryItem from onFailure: Network failures should not trigger delivery processing.
• Remove hardcoded throw from processDeliveryItem: Replace the unconditional throw new BackendAPIException with proper span completion logic (set status to OK and finish the span).

Related

See also the companion Flask backend fix in sentry-demos/empower for the server-side inventory validation errors that return HTTP 500.

[sentry]

📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
Android	com.example.vu.android	24.12.26 (241226)	release
Android	com.example.vu.android	24.12.26 (241226)	debug
Android	com.example.vu.android	24.12.26 (241226)	release

⚙️ android Build Distribution Settings

[codecov]

Codecov Report

❌ Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 0.00%. Comparing base (fbd7a20) to head (081a77f).

Files with missing lines	Patch %	Lines
.../example/vu/android/empowerplant/MainFragment.java	0.00%	6 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #228   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files         16      16           
  Lines        875     870    -5     
  Branches      65      64    -1     
=====================================
+ Misses       875     870    -5     

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