Keep HostId in memory

[GhenadieVP]

This is part of fixing the issue with user seeing Claim Profile prompt on iOS.

The root cause of the issue is that the iOS Wallet fails to resolve the host id and then we do consider that profile needs to be claimed. While this might be wrong assumption, just changing that to true is not the most correct fix.

The iOS wallet will fail to resolve the host id when the app is in background, as the access to the keychain is not allowed while the app is in background. We will try to resolve the host id every 15 minutes, which is the interval we do check for profile claim.
So this bug happens in a very specific scenario - when user moves the app to background somewhere at 13-14 minute - and when at 15 minute mark the wallet tries to resolve the host id, the following error is thrown by the secure storage:

OSStatus error:[-25308] User interaction is not allowed.

The fix, is to resolve the host id at boot time and then just read it from memory throughout the app lifecycle. Additionally, failing to resolve the host id is not considered a breaking error - even more, it is highly unlikely that the app will fail to perform secure storage operations at boot time.

[codecov]

Codecov Report

Attention: Patch coverage is 80.95238% with 4 lines in your changes missing coverage. Please review.

Project coverage is 93.2%. Comparing base (a2b1692) to head (a62d5b0).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/sargon/src/system/sargon_os/sargon_os.rs	80.0%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main    #303     +/-   ##
=======================================
- Coverage   93.3%   93.2%   -0.1%     
=======================================
  Files       1095    1095             
  Lines      22962   22966      +4     
  Branches      77      77             
=======================================
  Hits       21427   21427             
- Misses      1521    1525      +4     
  Partials      14      14             

Flag	Coverage Δ
kotlin	97.9% <ø> (ø)
rust	92.7% <80.9%> (-0.1%)	⬇️
swift	94.9% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...s/sargon/src/system/sargon_os/sargon_os_profile.rs	85.7% <100.0%> (-0.2%)	⬇️
crates/sargon/src/system/sargon_os/sargon_os.rs	78.8% <80.0%> (-1.6%)	⬇️

[CyonAlexRDX]

Excellent job tracking this one down! 👏