Find the real gaps between Sage Intacct and Constant Contact

**Objective:** Reconcile active Sage Intacct customers against Constant Contact by email address, checking up to `{max-customers}` customers (default 100), optionally only those of customer type `{customer-type}`.

**Step 1: Read the customers**

Call `intacct-get-customer` with `status` set to active, `max-records` set to the limit, and `customer-type` set to `{customer-type}` if given. Put customers with a blank email in a No email in Intacct group.

**Step 2: Carry each email across**

For each customer email, call `constant-contact-get-contact` with `email-address`. If nothing comes back, record the customer as missing from Constant Contact and continue.

**Step 3: Compare the matches**

For each match, compare:

* Intacct customer-name against Constant Contact company-name
* city, state and country
* whether permission-to-send is unsubscribed

Treat case, surrounding spaces, punctuation and common suffixes (Inc, LLC, Ltd) as equal. Use state codes and full names as equal (MN and Minnesota). Flag only real differences.

**Step 4: Report**

Four sections with counts: Missing from Constant Contact, Unsubscribed customers, Details differ (one row per field that differs, with both values), No email in Intacct. End with how many customers matched cleanly.

**Rules & Guidelines:**

* Tools whose names start with intacct are on the intacct server; tools whose names start with constant-contact are on the constant-contact server.
* Read-only. Do not call `constant-contact-add-contact`, `constant-contact-update-contact`, `intacct-update-customer`, `intacct-create-contact` or `intacct-update-contact`. Do not say which system is right; report both values.

**Validation:**

* If no active customers come back, say so and stop.
* If one email is shared by several customers, list them together as a shared address instead of matching it more than once.