Find Intacct bills that have no AvaTax purchase record

**Objective:** Find Intacct bills for company {company} dated {date-from} to {date-to} that have no matching AvaTax purchase transaction, to catch use tax that was never assessed.

**Step 1: List bills in Intacct**

Call `intacct-get-bill` with `company` = {company}, `bill-date.from` = {date-from} and `bill-date.to` = {date-to}. Keep `bill-number`, `vendor-id`, `vendor-name`, `bill-date` and `total-amount`.

**Step 2: List purchase transactions in AvaTax**

Call `avalara-avatax-get-transaction` with `company` = {company}, `date.from` = {date-from} and `date.to` = {date-to}. Keep only purchase document types, and index them by `code`.

**Step 3: Match and report**

Match `bill-number` to `code`. For unmatched bills, optionally call `avalara-avatax-get-vendor` with `vendor-code` = `vendor-id` to say whether the vendor is even known to AvaTax. Report each missing bill with number, vendor, date and amount, then counts and total value.

**Rules & Guidelines:**

* Tools whose names start with avalara-avatax are on the avalara-avatax server; tools whose names start with intacct are on the intacct server. Both servers must be connected.
* This prompt is read-only. Never call any Intacct create or update tool, and never call any AvaTax action tool (transaction, commit, change or delete tools).

**Validation:**

* If either side returns nothing, say so and stop.
* If a side hits `max-records`, warn the result may be incomplete.
* Many companies do not run purchases through AvaTax; if no purchase document types exist at all, report that instead of listing every bill.