[FEAT] Allow Admins to Update Multiple Products in a Single Request.

[Lamido-stack]

[FEAT] Allow Admins to Update Multiple Products in a Single Request.

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Description

This pull request introduces a new feature: a batch update functionality for multiple products in a single request. The batch_update endpoint that accepts a list of product updates and processes.

Related Issue (Link to issue ticket)

#1122

Motivation and Context

The motivation for this change was to enable the ability to update multiple products at once, reducing the need for multiple individual update requests. This feature was required for:

1. Improving efficiency when updating large numbers of products.
2. Providing users with a clear, detailed response indicating which updates were successful and which ones failed.

How Has This Been Tested?

Testing was performed under the following conditions:

1. Valid Updates: Multiple products were updated simultaneously. All products were valid and the updates were successful.
2. Non-Existent Product ID: I tested with a batch of products where one or more products had invalid or non-existent product IDs, ensuring the endpoint handled such cases and returned appropriate error messages.

Tests were conducted using FastAPI's Swagger UI (interactive documentation)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

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[joboy-dev]

Where are your tests??

[Lamido-stack]

will add them

[samuelogboye]

LGTM

[samuelogboye]

Instead of fetching each product individually inside the loop, retrieve all products at once using a single query before entrying the loop for update.

This reduces the number of DB hits and speeds up processing.