Add Products should allow for multiple suppliers per product

[gohqingkhang]

Steps to reproduce: add_product n/pear su/Beverages Unlimited su/Dairy Delights

expected: allowed to be added as pears could come from 2 different suppliers

actual: error message: Multiple values specified for the following single-valued field(s): su/

[nus-pe-bot]

Team's Response

Justification for Not In Scope: UG specifies the behavior clearly

• UG states that a product cannot be assigned to more than one supplier at the same time, reinforcing the one-to-one relationship between a product and its supplier.
• This means that the observed behavior aligns with the system's documented functionality. The software is not expected to support multiple supplier assignments for a single product.

(image of UG)

The software handles the scenario gracefully

• The software does not crash when the user attempts to assign a product to multiple suppliers. It responds with an error message, suggesting that there might be extra prefixes added.

Justification for Severity.Low:

• It is uncommon for a product to be assigned to multiple suppliers simultaneously. Most use cases involve one-to-one relationships between suppliers and their products.
• If users decide to switch to another supplier, they can unassign the product from its current supplier and then assigning it to the new supplier.

  Items for the Tester to Verify

  :question: Issue response

Team chose [response.NotInScope]

• [ ] I disagree

Reason for disagreement: [replace this with your explanation]

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## :question: Issue severity Team chose [`severity.Low`] Originally [`severity.Medium`] - [ ] I disagree **Reason for disagreement:** [replace this with your explanation]

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