Extract shared WooPosOrderCreatedData to remove duplicated types

[kidinov]

Description

[Internal] Extract ProductInfo and CouponInfo data classes from the duplicated OrderCreated event definitions into a shared WooPosOrderCreatedData class.

Both ChildToParentEvent.OrderCreated and ParentToChildrenEvent.OrderCreated had identical ProductInfo (Simple + Variation) and CouponInfo hierarchies defined independently. This forced a 37-line boilerplate mapping function (handleOrderCreated) in WooPosHomeViewModel that copied every field one-by-one between the two identical types.

Now both events wrap a single WooPosOrderCreatedData, eliminating the duplication and the mapping code entirely.

Test Steps

1. Open the POS
2. Add products (simple + variable) and a coupon to the cart
3. Check out
4. Verify the cart updates correctly after order creation (prices, names, coupon discounts reflect server response)
5. Verify "Changes in the cart" toast appears if the server returned different data
6. Start a new transaction and confirm everything resets properly

Images/gif

N/A — no UI changes.

• I have considered if this change warrants release notes and have added them to RELEASE-NOTES.txt if necessary. Use the "[Internal]" label for non-user-facing changes.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce Android
	Platform	📱 Mobile
	Flavor	Jalapeno
	Build Type	Debug
	Build Number	739
	Version	24.5-rc-1
	Application ID	com.woocommerce.android.prealpha
	Commit	26239af
	Installation URL	6kpbvebvj0rj8

Automatticians: You can use our internal self-serve MC tool to give yourself access to those builds if needed.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 84.44444% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 39.64%. Comparing base (b3ed27d) to head (26239af).
⚠️ Report is 7 commits behind head on trunk.

Files with missing lines	Patch %	Lines
...roid/ui/woopos/home/cart/WooPosCartItemsUpdater.kt	33.33%	0 Missing and 4 partials ⚠️
...android/ui/woopos/home/cart/WooPosCartViewModel.kt	0.00%	2 Missing ⚠️
...erce/android/ui/woopos/home/WooPosHomeViewModel.kt	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##              trunk   #15604      +/-   ##
============================================
- Coverage     39.64%   39.64%   -0.01%     
- Complexity    11357    11358       +1     
============================================
  Files          2259     2260       +1     
  Lines        130543   130492      -51     
  Branches      18284    18283       -1     
============================================
- Hits          51756    51728      -28     
+ Misses        73502    73479      -23     
  Partials       5285     5285              

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[malinajirka]

LGTM, nice cleanup!