Compact WooCommerce list results by default; render large tool results without indentation - #1635

Summary

Second step after #1631. #1631 gave every installed WooCommerce connector the optional _fields key (110 of 111 updated at the 10:56 boot). This PR gives _fields a compact default on woocommerce_list_orders and woocommerce_search_products. A list call that doesn't pass _fields now gets small objects: about 1-2 KB per order instead of 50-100 KB. It also stops the backend from pretty-printing multi-megabyte tool results.

Matteo approved the default (customer-visible change) on 2026-11-11. The shop with the daily 600+ MB of full orders was told by email beforehand.

Changes

• woocommerce.json, _fields default:
  • Orders: status, dates, totals, payment method, billing and shipping, line items without meta, shipping lines, coupon codes, refunds.
  • Products: ids, name, SKU, type, prices, stock, categories, link, modified date.
  • Not included: meta_data, descriptions, images, _links.
  • Full objects: pass _fields: "" (the engine drops an empty value, so WooCommerce returns complete objects), add meta_data to the list, or use the get tools. Descriptions and the instructions say so.
  • Why it rolls out by itself: the endpoint mapping is unchanged from Auto-apply catalog updates that only add optional query parameters; WooCommerce sync filters #1631, so on installed connectors this is a parameters-only change: safe class, applied at the next boot.
• dynamic-mcp-tools.ts renderResult: the result is serialised compactly first, and only results up to 1,000,000 characters (COMPACT_RENDER_CHARS) are re-rendered with indentation. A 10 MB page used to be pretty-printed to ~25 MB and then serialised a second time when over the limit. A plain string is still serialised once.
• Specs:
  • woocommerce.live.spec.ts: defaults content; "" documented; why a key and its default cannot arrive in the same deploy.
  • catalog-resync.additive.spec.ts: fixture moved to the modified_* keys.
  • dynamic-mcp-tools.spec.ts: a large object renders compactly without a pretty pass.

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)

In packages/backend:

• npx jest src/adapters/intl/woocommerce src/connectors/catalog-resync: passed.
• dynamic-mcp-tools.spec needs @aws-sdk/client-s3, which my local node_modules lacks, so it runs in CI.
• eslint on the changed files: clean.

From the root: validate-adapters --warn shows no new warning, regenerate-catalog shows no diff, adapter-count --check is OK.

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

Cloud and self-hosted behave the same.

Related Issues

Follow-up to #1619 and #1631.