Add QFE reference elevation message to telemetry system

[ETSells]

Description

Simple change: Adds a message with calibration offsets to the telemetry system for use on the frontend.

Issue Link

Closes #137

Parent: SunDevilRocketry/SDEC-API#24

Testing

• Passes existing automated tests
• Automated tests modified
• Manual test performed

https://discord.com/channels/1533570052677304420/1533588614301220884/1540196574372827146

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Reviewer Checklist

Standards

• Follows FCF Architectural Standards
• Follows SDR Coding Standards
• Code complexity/function Size is minimized
• Code is testable
• Code is readable and commented properly
• License terms are respected

Accuracy

• Code implements the correct requirement (a.k.a. does the right thing)
• Code is logically correct (a.k.a. does the thing right)

Error Handling

• Potentially unsafe functions return a status code
• Error returns properly handled
• Fail-fast errors are only thrown when unsafe to continue software execution
• Debug errors are thrown for exceptions where execution should still continue (to be noticed during development)

Memory

• Stack allocated memory is scoped correctly
• Heap allocated memory is not used
• Statically/Globally allocated memory is minimized except when necessary
• Pointers are used correctly
• Concurrent access has been considered (especially by/from interrupt service routines)

Performance

• Rate limiters are respected
• Busy waiting is avoided in performance sensitive code
• "Delay" calls are not used in performance sensitive code
• If performance is negatively impacted, a justification is provided and the impact is quantified