Fixed procedure dates

[AdritRao]

Fixing procedure dates

♻️ Current situation & Problem

Not all procedures had dates being extracted from the JSON resources. Without all of the dates being sent to the LLM, it cannot understand the full context and timeline of the patients procedures.

⚙️ Release Notes

The only change in this PR was made in FHIRResource.swift. The modification ensures that the end date of the procedure is taken in each of the resources (which is consistent between DSTU2 and R4).

if case let .period(period) = procedure.performed {
    return try? period.end?.value?.asNSDate()
}

📝 Code of Conduct & Contributing Guidelines

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• I agree to follow the Code of Conduct and Contributing Guidelines.

[codecov]

Codecov Report

Merging #14 (2354244) into main (d60882b) will not change coverage.
The diff coverage is 0.00%.

❗ Current head 2354244 differs from pull request most recent head cb43cae. Consider uploading reports for the commit cb43cae to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #14   +/-   ##
=======================================
  Coverage   46.15%   46.15%           
=======================================
  Files          19       19           
  Lines        1205     1205           
=======================================
  Hits          556      556           
  Misses        649      649           

Files	Coverage Δ
Sources/SpeziFHIR/FHIRResource/FHIRResource.swift	14.05% <0.00%> (ø)

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