[ELI-686] - Adding custom subsegments for xray

[TOEL2]

Description

Adds in some wrappers to tell xray to track and organise bits of the code so that we can see it clearly in the dash and query it through the python sdk using subsegment names.

Focuses on external calls that we do as they are the bottleneck

well help us optimise our code by providing data about performance

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

Checklist

• I am familiar with the contributing guidelines
• I have followed the code style of the project
• I have added tests to cover my changes
• I have updated the documentation accordingly
• This PR is a result of pair or mob programming

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Sensitive Information Declaration

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• I confirm that neither PII/PID nor sensitive data are included in this PR and the codebase changes.

[eddalmond1]

No objection, would be good to have the sub segments or whatever in a diagram on the ticket / Confluence to illustrate what we expect to see