Rename root, api and sdk module paths (imports, go.mod, go_package,
ldflags, build scripts, buf configs) and regenerate protobuf/gateway
code with the project's pinned toolchain. Wire identifiers unchanged.
api gets a local replace for sdk; root/api/sdk require v0.1.0.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
The iam package is very foundational, and now depends
on the pagination package. Thus, the pagination package
must not import any packages that may import iam,
such as the plugin package. Move the plugin helpers
to a subdirectory to avoid this import cycle.