🌿 Fern Regeneration -- May 12, 2026

[fern-api]

This PR regenerates code to match the latest API Definition.

---

Note

Medium Risk
Mostly auto-generated SDK surface-area changes, but it adds new client modules and request parameters that could introduce behavioral/typing regressions for existing consumers.

Overview
Regenerates the Python SDK to 2.47.0 (updates lockfile deps and bumps SDK headers), reflecting the latest API definition.

Adds a new top-level speech_engine client with CRUD/list operations and new related response/config types, and updates Conversational AI endpoints/docs so agent_id parameters can also accept a seng_… speech engine external id.

Extends Knowledge Base support by allowing document updates to include optional content, adding document.update_file (multipart PATCH to replace a file document’s source), and introducing documents.chunks.list to fetch RAG chunks.

Expands other APIs with new optional inputs: phone_numbers.update now accepts environment and branch_id, service account API keys support allowed_ips (create/update), Speech-to-Text adds several transcription options (e.g., redaction/keyterms/roles), Voices update adds moderate_metadata, Webhooks add request_headers, and Workspace adds an analytics requests.get endpoint.

^{Reviewed by Cursor Bugbot for commit dd6c529. Bugbot is set up for automated code reviews on this repo. Configure here.}