Fix: Prevent crash by handling missing eventType in updateTreatments

[bjorkert]

Summary

This pull request addresses a critical issue where the application could crash if an eventType was missing in any of the entries processed by the updateTreatments function. By implementing a guard statement to check for the presence of eventType, we ensure the function safely skips any entries lacking this essential piece of data.

Changes

• Added a guard statement in updateTreatments to check for the presence of eventType in each entry.
• Entries without an eventType are now safely ignored, preventing potential crashes.

Testing

• Tested with a dataset containing a mix of entries with and without eventType to ensure that the function behaves as expected.
• Confirmed that entries missing eventType are skipped without causing crashes, while valid entries continue to be processed correctly.

Please review the changes and let me know if there are any concerns or further improvements needed. Thank you!

[bjorkert]

• Switched from a traditional for i loop to a more Swift-idiomatic for-in loop.
• Corrected a typo in the condition that checks basalData.count.