Drop the ./server entry point in 0.2.0

[bodhish]

Summary

Remove the ./server entry point (createServerClient, createSession, mintSessionToken) in the next breaking release (0.2.0). It is not removed in 0.1.0 (already published) to avoid a breaking change on a patch/minor.

Why

./server is a TypeScript helper for the account-secret half of the flow (create session + mint scoped token). But the real consumers implement that server side in their own backend language:

• Care does it in Python via the care-scribe-be Django plugin — a TS helper is unusable there.
• The browser SDK (the genuinely hard part: mic capture, resumable chunk upload, polling) plus a documented 2-endpoint REST contract (create session + mint token) is all any backend needs, in any language.

Shipping an unused, language-locked server helper adds public API surface and maintenance for no current consumer (YAGNI).

Plan for 0.2.0

• Remove the ./server export, src/server.ts, and its tests.
• Keep the shared types (OutputSpec, FieldSpec, StartSessionOptions) exported from . so backends can still type their payloads.
• Document the two backend operations as a REST contract in the README (method, path, request/response, auth), so any backend implements them.
• Bump to 0.2.0 and note the removal in the changelog.

Alternative (if a Node/TS backend consumer appears)

Keep ./server. It's tree-shakeable and harmless; re-evaluate if/when a Node-backed app actually uses it.