Trace a BigCommerce order through to its Business Central invoice

**Objective:** Trace BigCommerce order `{order-id}` into Business Central and report how far it has progressed.

**Step 1: Read the order in BigCommerce**

Call `bigcommerce-get-order` with `id` = `{order-id}`. If nothing returns, say so and stop. Keep `id`, `status`, `total-including-tax`, `refunded-amount`, `billing-email` and `date-created`. Then call `bigcommerce-get-order-product` with `order-id` = `{order-id}` for the lines (sku, quantity, total-including-tax).

**Step 2: Find the sales document in Business Central**

Call `business-central-get-sales-transaction` with `external-document-number` = `{order-id}`. If `{company}` is given, pass it as `company`. If nothing returns, report the order as not yet in Business Central, state the BigCommerce billing email, and skip to Step 4.

**Step 3: Follow it through posting**

If a document is found, call `business-central-get-sales-transaction-line` with its `document-number` and compare line count, quantities and amounts to the BigCommerce lines. Then call `business-central-get-posted-sales-invoice` with `external-document-number` = `{order-id}` (or `order-number` = the document number) and note `invoice-number`, `total-amount-including-tax` and `remaining-amount`.

**Step 4: Report**

A short timeline: BigCommerce order (status, total) -> Business Central document (number, type, status) -> posted invoice (number, remaining amount). Then a list of discrepancies: total mismatches, missing lines, quantity gaps.

**Rules & Guidelines:**

* Tools whose names start with bigcommerce-  are on the bigcommerce server; tools whose names start with business-central-  are on the business-central server. Both must be connected.
* Read-only: do not call any `-add`, `-update`, `-delete`, `-create` tool on either server.

**Validation:**

* Order ids are matched as text; the Business Central `external-document-number` is expected to hold the BigCommerce order id.
* If several Business Central documents match, list them all and compare against each.
* A total gap can come from tax or shipping; show both totals and say which is which instead of calling it an error.