refactor: update order details calculation and mock data integration

[michnowak]

What does this PR do?

• My bugfix

Related Ticket(s)

• Notion Ticket

Key Changes

• How does the code change address the issue? Describe, at a high level, what was done to affect change.
• What side effects does this change have? This is the most important question to answer, as it can point out problems where you are making too many changes in one commit or branch. One or two bullet points for related changes may be okay, but five or six are likely indicators of a commit that is doing too many things.

How to test

• Create a detailed description of what you need to do to set this PR up. ie: Does it need migrations? Do you need to install something?
• Create a step by step list of what the engineer needs to do to test.

Media (Loom or gif)

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1 Skipped Deployment

Project	Deployment	Review	Updated (UTC)
o2s-docs	Skipped		Jan 19, 2026 11:14am

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