Keep WooCommerce order lists small and state weclapp's sort syntax - #1619

Summary

Two adapter definitions led models into slow or failing calls on Cloud (2026-11-09 daily check):

• WooCommerce list_orders returns complete orders. At per_page 100 that is 5 to 9 MB per call: one workspace made 180 such calls in a day (865 MB, 8.2 s each on average) and 21 of the day's 104 event-loop stalls over 1 s came right after its bursts; another workspace timed out at 31 to 38 s. The tool offered no way to trim the response and no page-size guidance.
• weclapp sort only said "Sort field, prefix with '-' for descending". Models sent invoiceDate:desc or fields the record does not have (bookingDate on stock movements), about 25 of 53 weclapp errors across 8 workspaces.

Changes

• intl/woocommerce.json: woocommerce_list_orders and woocommerce_search_products get WordPress's _fields query parameter (optional, empty = complete records, so nothing changes for existing callers) and a per_page description that recommends 20 to 50. list_orders says to read one complete order with woocommerce_get_order.
• de/weclapp.json: the sort description on all 25 list tools states the syntax (bare field name, - for descending), says field:desc fails, and gives an example that exists on that record (-invoiceDate for invoices, -postingDate for stock movements, -createdDate elsewhere).

Cloud and self-hosted behave the same. The new _fields parameter changes endpointMapping, so installed WooCommerce connectors get it after "Apply update"; the descriptions sync on their own.

Type

• Bug fix
• New feature
• Documentation
• Refactoring
• Performance improvement
• Other (describe below)

Testing

• Added/updated unit tests
• Tested manually (describe steps below)
• No tests needed (explain why)

Definition-only change; the static catalog specs cover it. From the repo root: node scripts/validate-adapters.mjs --warn (no new warning for these tools), node scripts/regenerate-catalog.mjs (catalog.ts unchanged), node scripts/adapter-count.mjs --check (OK, 730 adapters). In packages/backend: npx jest src/adapters/de/weclapp.spec.ts and the WooCommerce static specs pass; the full suite runs in CI (local Prisma client was out of date for unrelated suites).

Checklist

• My code follows the existing code style
• I have tested my changes locally
• I have updated documentation (if applicable)
• All existing tests pass (npm test) (CI)
• This PR has a descriptive title

Related Issues

Found in the 2026-11-10 daily check (Cloud tool errors and event-loop stalls).