🤖 Implement inventory validation in checkout process

[sentry-autofix]

👋 Hi there! This PR was automatically generated by Autofix 🤖

This fix was triggered by Danny Abou-Chakra

Fixes REACT-5FC

• Added inventory check before completing checkout to prevent overselling.
• Implemented enough_inventory? helper method in CheckoutController to validate inventory.
• Added tests to verify checkout behavior with sufficient and insufficient inventory.
• Improved error handling and reporting for inventory issues, including Sentry capture and user-friendly alerts.
• Updated React component to handle inventory errors and display alerts to the user.

If you have any questions or feedback for the Sentry team about this fix, please email [email protected] with the Run ID: 6668.

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Name	Status	Preview	Comments	Updated (UTC)
empower	⬜️ Ignored (Inspect)	Visit Preview		Feb 27, 2025 4:47pm

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 15 lines in your changes missing coverage. Please review.

Project coverage is 29.66%. Comparing base (63e4f96) to head (7b91ba4).

✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
react/src/components/Checkout.jsx	0.00%	15 Missing ⚠️

❌ Your project check has failed because the head coverage (29.66%) is below the target coverage (35.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #701      +/-   ##
==========================================
- Coverage   30.10%   29.66%   -0.45%     
==========================================
  Files          38       38              
  Lines         940      954      +14     
  Branches      113      119       +6     
==========================================
  Hits          283      283              
- Misses        640      654      +14     
  Partials       17       17              

Flag	Coverage Δ
api	6.59% <ø> (ø)
frontend	45.89% <0.00%> (-1.18%)	⬇️

Components	Coverage Δ
checkout_module	6.59% <ø> (ø)
product_component	41.49% <0.00%> (-1.81%)	⬇️

Files with missing lines	Coverage Δ
react/src/components/Checkout.jsx	15.66% <0.00%> (-3.18%)	⬇️