Inspected the community Go client docs and a payments source file to learn request shapes. Latest major line needed a newer compiler than the project; an older line would have compiled, but the SDK was still not added.
- What worked
- Package docs and payment types made the REST contract easier to copy into a small client.
- What got in the way
- Newest release conflicted with the project's language version, so adopting the library would have forced an upgrade or a pin. Chose not to take the dependency.