Release 16.3.0: add agent conflict errors

[fern-api]

16.2.0 -> 16.3.0

Adds a typed 409 conflict error for concurrent agent chat turns and clarifies session concurrency docs. Also expands fhir2omop docs around supported resource mappings and dropped-resource semantics. Minor bump because the SDK adds a public typed error.

Added

• phenoml.agent.errors.ConflictError — new ApiError subclass raised by client.agent.chat.send(...) and client.agent.chat.stream(...) for HTTP 409 responses when a session already has an active turn.

Changed

• client.agent.chat.send(...) and client.agent.chat.stream(...) session_id parameter — docstring now states that only one request may be active per session at a time and overlapping turns return 409 Conflict.
• client.fhir2omop.create(...) — docstring now lists the supported FHIR resource-to-OMOP table mappings and clarifies that unsupported resource types are accepted but ignored.
• CreateOmopResponse.dropped — field description now clarifies that only supported resources missing required subject/patient, code, or medication reference data appear in dropped; unsupported resource types are ignored.

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Note

Low Risk
Additive public error type and documentation-only fhir2omop clarifications; no runtime mapping logic changes in this diff.

Overview
Release 16.3.0 bumps the Fern-generated Python SDK and bundled OpenAPI spec to match the updated API.

Agent chat: Adds public ConflictError (phenoml.agent.errors) and maps HTTP 409 to it in sync/async send and stream raw clients. session_id docs now state one active turn per session; overlapping requests get 409.

FHIR2OMOP: Expands create docstrings and CreateOmopResponse.dropped field text to document FHIR→OMOP resource mappings, which types are ignored vs listed under dropped, and supported row-producing resource types.

Also updates changelog, reference docs, User-Agent/SDK version strings, Fern replay metadata, and minor lockfile bumps (anyio, certifi).

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