Find Shopify B2B companies with broken Intacct links

**Objective:** Check up to `{max-companies}` Shopify B2B companies (default 100), optionally only those whose name contains `{name-contains}`, and report which ones are not correctly linked to an Intacct customer through their external ID.

**Step 1: Read the Shopify companies**

Call `shopify-get-company` with `max-records` = `{max-companies}` (default 100) and, if set, `name.contains` = `{name-contains}`. Keep `company-id`, `name`, `external-id`, `orders-count` and `total-spent`.

**Step 2: Check each one in Intacct**

* If `external-id` is set, call `intacct-get-customer` with `customer-id` = that value.
  * Found, and `customer-name` equals the Shopify name (ignoring case and punctuation): linked.
  * Found, but the name differs: "linked, name differs".
  * Not found: "broken link".
* If `external-id` is empty, call `intacct-get-customer` with `customer-name.contains` = the Shopify name.
  * Exactly one match: "unlinked, candidate found" with the candidate's `customer-id`.
  * Several: "unlinked, ambiguous" with the candidates.
  * None: "unlinked, no Intacct customer".

**Step 3: Report**

Group the companies by outcome, worst first: broken link, unlinked with no customer, ambiguous, candidate found, name differs. For each row show the Shopify name, external-id, orders-count, total-spent, and the Intacct customer id and name where there is one. Sort each group by `total-spent`, highest first, so the most valuable accounts come first. End with counts per group.

**Rules & Guidelines:**

* `shopify-get-company` is on the shopify server. `intacct-get-customer` is on the intacct server.
* This prompt is read-only. Do NOT call `shopify-update-company` or `intacct-create-customer`. To fix one company, suggest the link-b2b-company-to-intacct prompt.
* A candidate found by name is a suggestion, not a match. Never describe it as linked.

**Validation:**

* If Shopify returns no companies, the store may not use B2B; say so and stop.
* If every company has an empty external-id, say the store has not been linked to Intacct yet and report only the candidate search.