Replace axios with the platform fetch (zero runtime deps; drops axios + ulid)
so the client runs unchanged in Node 18+ and the browser, and tree-shakes/
bundles smaller. Request ids now use crypto.randomUUID with fallbacks.

Implement the SYSTEM_ARCHITECTURE error model: every failure throws a typed
OdxError subclass carrying the JSON-RPC code/message/data, including Odoo
logic errors returned on a 200 (two-step rule). This changes error behavior
from value-style to thrown — breaking, but acceptable pre-1.0.

Add the remaining gateway endpoints (version, about, license, metrics),
per-call options (x-request-timeout + AbortSignal), and Accept-Encoding.
Fix the sort->order keyword strip bug and guard call_method's fn_name.

Tests: add hermetic fetch-mocked unit suite; rewrite the live integration
suite as a full res.partner lifecycle, guarded to skip without creds and
tolerant of user_id/gateway_url in .env. Add .env.example. Bump to 0.1.7.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Correct the search_read keyword (sort -> order), document read's
positional field list, and fix fields_get's return type (object keyed
by field name, not an array).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>