Add cancelAutoOrderItemByReferenceOrderId samples across all languages

[ucjonathan]

Summary

• Bumps every language's SDK pin to 4.1.74 (Ruby, JavaScript, TypeScript, PHP, Python, Java, C#)
• Adds one sample per language under each <lang>/auto_order/ directory demonstrating the new cancelAutoOrderItemByReferenceOrderId method on AutoOrderApi
• Adds SDK_PUBLISHING_ISSUES.md documenting that the Java SDK is stuck at 4.1.13 on Maven Central and the C# SDK is stuck at 4.1.66 on NuGet — both need a new publish before their samples can build

Notes

• The new method takes reference_order_id + original_item_id and cancels a single item on the matching auto order — useful when you know the original UltraCart order id but not the auto_order_oid.
• All 7 samples follow the conventions of the existing pauseAutoOrder sample in each language (helper-based client init, placeholder IDs, single API call, print response).
• Java and C# samples are authored against inferred signatures since the SDKs aren't published yet; each file carries a one-line comment calling that out.

Test plan

• Ruby: ruby -c — syntax OK
• JavaScript: node --check — OK
• TypeScript: tsc --noEmit against real 4.1.74 SDK types — OK (confirms method signature matches)
• PHP: php -l — OK
• Python: py_compile — OK
• Java: post-publish mvn package smoke test once rest-sdk 4.1.74 lands on Maven Central
• C#: post-publish nuget restore + MSBuild smoke test once com.ultracart.admin.v2 4.1.74 lands on NuGet
• No live API calls made — samples use placeholder IDs (DEMO-12345678, ITEM001) consistent with other samples in the repo

🤖 Generated with Claude Code