Regenerate SDK client core from gateway OpenAPI spec

[njbrake]

Automated regeneration of the generated typed client core (all
endpoints) from the otari gateway OpenAPI spec. The hand-written shell
(streaming, error mapping, ergonomic methods) is unaffected.

Source: mozilla-ai/otari@381ef1a
Generated by .github/workflows/gateway-sdk-codegen.yml.

[njbrake]

Note: this comment was drafted by Claude via back-and-forth with @njbrake. The reasoning and decisions are his; the prose is Claude's.

Closing this as drift, not a real change.

This regen was produced by the codegen workflow before the OpenAPI Generator version was pinned through a mechanism the CLI actually honors. The @openapitools/openapi-generator-cli wrapper ignored the workflow's OPENAPI_GENERATOR_VERSION env var and resolved the latest generator (7.23.0) instead of the 7.22.0 the SDK cores were generated and validated against. The diff here is purely that generator-version difference (dropped typed sub-models, changed audio param), not an intended spec change.

mozilla-ai/otari#109 pins the generator via a committed openapitools.json (generator-cli.version: 7.22.0). Once that merges, a fresh regen is a verified no-op against the current core. No action needed on this SDK.