feat: add effort to SpeakerIdentificationRequest

[MLawlz]

Fixes #167.

Problem

The speaker identification docs document an effort field under speech_understanding.request.speaker_identification, but SpeakerIdentificationRequest doesn't declare it, so TypeScript users can't set it without casting:

await client.transcripts.submit({
  audio_url: audioUrl,
  speaker_labels: true,
  speech_understanding: {
    request: {
      speaker_identification: {
        speaker_type: "name",
        effort: "medium", // TS2353: Object literal may only specify known properties
      },
    },
  },
});

Change

• Add SpeakerIdentificationEffort ("low" | "medium") and an optional effort field on SpeakerIdentificationRequest, defaulting to "low" server-side, per the docs.
• Add tests/unit/speaker-identification.test.ts covering the field serializing into the request body, the field being omitted when unset, and both documented values type checking.
• CHANGELOG entry + patch version bump.

Type-only, additive, and backward compatible — effort is optional, so existing code is unaffected.

Note for maintainers

src/types/openapi.generated.ts is generated from the internal OpenAPI spec, which I don't have access to. This edits the generated file directly, so the spec needs the same field added upstream or the next pnpm generate:types run will drop it.

One thing worth confirming separately (out of scope here): the docs describe the speaker list as speakers, an array of objects ({ name } / { role } / description / arbitrary custom keys), while the SDK type has known_values?: string[]. If the docs are current, that type is stale too and users following the docs will hit the same class of error. Happy to follow up with a PR once someone confirms which shape the API takes.

Testing

• tests/unit/speaker-identification.test.ts — 3 passed
• Full unit suite: 197 passed, 3 failed — all failures pre-exist on main and are unrelated (utils.test.ts runtime_env=Node/ assertions under local Node 24, and a WritableStream type mismatch in realtime.test.ts)
• pnpm lint (eslint + tsc + publint) and pnpm build pass; the remaining prettier --check warnings are pre-existing on main in files this PR doesn't touch

🤖 Generated with Claude Code

[jhazenaai]

effort should be for all llm speech understanding tasks, and all tasks can take it

[MLawlz]

Should be addressed now @jhazenaai so would love another review when you have a sec

[jhazenaai]

Summarization & Action items missing. Can add in a follow up.