ag-monitor now drops expired delivery months from /api/data/latest by
default (current + future only). Expose the opt-in through the MCP so the
advisor can fetch past months when a farmer explicitly asks for history,
while the default stays current + future.
- client.latest(include_expired=False): forwards include_expired=true only
when set (None is dropped), so the default query string is unchanged.
- latest_prices tool: new include_expired arg with a description steering
the model to set it only on an explicit historical request.
Tests: client passthrough (default omits the param; opt-in forwards it).
43 passed.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>