Log Business Central opportunities once, against the right contact

**Objective:** Log an opportunity `{description}` for `{contact}`, worth `{estimated-value}`. Use the closing date the user mentions, or 90 days from today.

Pass `{company}` as the company argument on every call. If `{company}` is empty, leave the company argument out so the connector's default company is used.

**Step 1: Resolve the contact**

Call `business-central-get-contact` with name.contains set to `{contact}`, and if nothing comes back with company-name.contains. If several match, list them and stop. If none match, offer to create one with `business-central-create-contact` (display-name, job-title, email, company-name) as part of the confirmation.

**Step 2: Check for duplicates**

Call `business-central-get-opportunity` with closed false and contact-company-name set to the contact's company. Show any open opportunity with a similar description and ask whether to continue.

**Step 3: Salesperson**

Use the contact's salesperson-code unless the user names someone; check with `business-central-get-salesperson`.

**Step 4: Preview and confirm**

Show contact, description, salesperson, estimated value, closing date, chance of success if given. Ask for confirmation.

**Step 5: Create**

After confirmation call `business-central-create-opportunity` once with contact-number, description, salesperson-code, estimated-value, estimated-closing-date and chance-of-success-percent when given. Keep the returned id.

**Step 6: Confirm the result**

Call `business-central-get-opportunity` with the returned opportunity number and report it. If the user wants a correction straight away, use `business-central-update-opportunity` with the returned id; no read tool returns opportunity ids, so existing opportunities cannot be updated through these tools.

**Rules & Guidelines:**

* Do not call any create or update tool until the user has confirmed the exact values shown in the preview.
* Create at most one opportunity and at most one contact.

**Validation:**

* If `{estimated-value}` is not a number, ask.