ObsDetails calls observations/viewed_updates while signed out

[joergmlpts]

Describe the bug
When not signed in, an API error is reported in debug builds on each navigation to ObsDetails.

To Reproduce
Steps to reproduce the behavior:

1. Run a debug build of v0.56.0+131.
2. Do not sign in; sign out if you are signed in.
3. Go to Explore, Observations, tap an observation.
4. An API error is reported:

ERROR  Error requesting https://api.inaturalist.org/v2/observations/4d46480c-4a47-499b-96dd-041853201e4f/viewed_updates (status: 401):
   {"status":"401","errors":[{"errorCode":"401","message":"JWT is missing or invalid"}]} [INatApiError: {"status":"401","errors":[{"errorCode":"401","message":"JWT is missing or invalid"}]}]

Expected behavior
When we are not signed in, do not issue API calls that require us to be signed in.

Context (please complete the following information):

• Device: Pixel 7 Pro
• OS: Android 15
• App version: v0.56.0+131

[kueda]

I can replicate in an iOS simulator.