🤖 Refine inventory verification logic in checkout process

[sentry-autofix]

👋 Hi there! This PR was automatically generated 🤖

Fixes FLASK-13R

The issue caused by 'Exception: Not enough inventory for product' is stemming from incorrect comparison logic within the checkout flow, more specifically, in the inventory and quantities comparison. The fix involves refining the comparison conditional to ensure it accurately represents scenarios where inventory is insufficient for the requested product quantities.

The steps that were performed:

1. Correct inventory validation logic

📣 Instructions for the reviewer which is you, yes you:

• If these changes were incorrect, please close this PR and comment explaining why.
• If these changes were incomplete, please continue working on this PR then merge it.
• If you are feeling confident in my changes, please merge this PR.

This will greatly help us improve the autofix system. Thank you! 🙏

If there are any questions, please reach out to the AI/ML Team on #proj-autofix

🤓 Stats for the nerds:

Prompt tokens: 14680
Completion tokens: 893
Total tokens: 15573