Add helper for generating stable test database fixtures from seed values

[Chucks1093]

Summary
Test fixtures that use randomized data produce non-deterministic results that are hard to debug when tests fail. A fixture helper that generates stable, deterministic creator records from a seed value makes failures reproducible and easier to investigate.

Scope

• add a helper that generates a creator fixture record with deterministic field values derived from a seed integer
• use the helper in at least two existing tests that currently use randomized or inline fixtures
• document the mapping from seed to generated field values

Acceptance Criteria

• the same seed value always produces the same fixture record
• different seed values produce distinct records
• at least two existing tests are updated to use the helper

Contributor coordination: if you pick this up, reach out in Telegram for updates or clarification: https://t.me/accesslayerorg

[Malcolm-Wander]

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Hello maintainer,I’d love to work on this issue please,I’ve got experience and I promise to work properly,thank you

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[shadrach68]

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Hello, I’m interested in contributing to it as part of my open-source learning journey. I would appreciate it if you could assign me.

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[Vvictor-commits]

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please assign

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