Catch Salesforce wins that never got billed in Stripe

**Objective:** Find opportunities closed won since `{closed-since}` (default: the first day of the previous month), optionally owned by `{owner}`, where no contact on the deal or its account is billed in Stripe.

**Step 1: List closed-won deals in Salesforce**

Call `salesforce-get-opportunity` with `won` set to true and `close-date.from` set to `{closed-since}`. Add `owner.contains` set to `{owner}` when it is given.

**Step 2: Collect the emails for each deal**

Call `salesforce-get-opportunity-contact-role` with `opportunity-id` set to the deal's opportunity-id, then `salesforce-get-contact` with `contact-id` for each role to get the email. If the deal has no contact roles, call `salesforce-get-contact` with `account-id` set to the deal's account-id instead and note that the match is account-level.

**Step 3: Look each email up in Stripe**

Call `stripe-get-customer` with `email` set to each email. For each customer found, call `stripe-get-subscription` with `customer-id` and check for a subscription created on or after the close-date with status active or trialing.

**Step 4: Report**

Three groups. No Stripe customer: opportunity name, account, owner, amount, close-date, emails tried. Stripe customer but no new subscription: the same plus customer-id and its latest subscription status. Billed: a one-line count only. Sort each group by amount, largest first.

**Rules & Guidelines:**

* `salesforce-get-opportunity`, `salesforce-get-opportunity-contact-role` and `salesforce-get-contact` are on the salesforce server. `stripe-get-customer` and `stripe-get-subscription` are on the stripe server.
* The join is the contact email against the Stripe customer email, matched case-insensitively and trimmed. Do not count a match on company name alone; if a Stripe customer name looks like the account name but no email matches, report it as a possible match only.
* This is read-only. The stripe server cannot create customers. Do not call `salesforce-update-opportunity`, `salesforce-add-task`, `salesforce-update-contact` or any other salesforce add or update tool.

**Validation:**

* If no deals closed won in the window, say so and stop.
* A contact with no email cannot be checked; list it as unverifiable rather than unbilled.