Add HubSpot products once, with the right SKU and price

**Objective:** Add the product `{product-name}` with SKU `{sku}` at price `{price}` to the product library, typed `{product-type}` (default non_inventory).

**Step 1: Check for duplicates**

* Call `hubspot-get-products` with `sku` = `{sku}`.
* Call `hubspot-get-products` with `name.contains` = `{product-name}`.

If either returns a product, show it (name, SKU, price, status) and ask whether to continue, or to update that product instead. If the user chooses update, use only `hubspot-update-product` with the fields they confirm.

**Step 2: Confirm**

Show name, SKU, price, product type, billing frequency (one-time unless the user says recurring) and description if given. Wait for an explicit yes.

**Step 3: Create**

Call `hubspot-add-product` once with `name`, `sku`, `price`, `product-type`, and `billing-frequency` / `description` when given.

**Step 4: Verify and report**

Call `hubspot-get-products` with `sku` = `{sku}` and report the stored product with its record-id.

**Rules & Guidelines:**

* Only `hubspot-add-product` (or `hubspot-update-product` if the user chose update) may write, once, after confirmation.
* Do NOT call any other write tool: no other hubspot-add, hubspot-update, hubspot-rename, hubspot-remove, hubspot-subscribe, hubspot-unsubscribe or hubspot-import tool.

**Validation:**

* `{price}` must be a number. If it is not, ask for one and stop.
* `{product-type}` must be inventory, non_inventory or service.