Sync from internal repo (2026/07/13)

[ccampbell-aai]

Copybara sync from the internal monorepo (master) → main. Bumps the SDK 4.35.4 → 4.36.3.

This sync introduces the synchronous transcription surface (client.sync) and its follow-up refinements.

4.36.0 — client.sync

• Add client.sync for synchronous transcription: audio in, transcript out in a single request against the sync API host — no job id, no polling. Accepts a local file path, raw bytes, a Blob, or a readable stream (not URLs), plus config for prompt, keyterms_prompt, conversation_context, language_codes, and raw PCM (sample_rate + channels).
• Add SyncTranscriber.warm() to pre-open the connection so the next transcribe() skips the DNS + TCP + TLS handshake.
• Add SyncTranscriptError with status, a machine-readable errorCode, and retryAfter (seconds) on 429/503 responses.
• Add the syncBaseUrl client option (defaults to https://sync.assemblyai.com).

4.36.1 — rename + default model

• Rename the sync surface introduced in 4.36.0 (never published under the old names): client.direct → client.sync, Direct* types → Sync*, directBaseUrl → syncBaseUrl; word_boost → keyterms_prompt.
• The default sync speech model is now universal-3-5-pro (sent as the X-AAI-Model routing header).

4.36.2 — opt-in word timestamps

• Add the opt-in timestamps sync config option. When true, sync words carry accurate start/end timings at a small latency cost. By default no timings are computed or returned; SyncWord.start/end are now optional and absent unless requested.

4.36.3 — canonical routes

• Target the canonical /v1 sync API routes (/v1/transcribe, /v1/warm); the unprefixed paths remain served for older SDK versions.

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Generated by Copybara from internal master. Merging this PR publishes 4.36.3 to npm.

[bgotthold-aai]

Add basic description