Duplicate and Incorrect SpO2 Field Behaviour in Log Update Form

[AdityaJ2305]

Describe the bug

In the Log Update Form, the fields rendered vary based on the selected round type. However, there are inconsistencies with the SpO2 field

1.  For round types other than “Nurse Log Update”, two SpO2 fields are rendered

 	* One as a TextFormField
 	* One as a RangeAutocompleteFormField with different thresholds.
 	
2.  For the rest of the round types, the RangeAutocompleteFormField is rendered but with incorrect thresholds.

To Reproduce

Steps to reproduce the behaviour:

1. Navigate to the Log Update Form.
2. Select any round type other than “Nurse Log Update”.
3. Observe the duplicate SpO2 fields (TextFormField and RangeAutocompleteFormField).
4. Select any round type again and verify the thresholds in the RangeAutocompleteFormField SpO2 field.

Expected behaviour

•	Only a single SpO2 field should be rendered across all round types.
•	The SpO2 field should always be a RangeAutocompleteFormField with the correct thresholds based on the round type.

Screenshots

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome]
• Version [e.g. 22]

Additional context
@Jacobjeevan I would like to work on this issue. Please assign it to me.