fix: [IEL-685] Added logic to poll the app's status in the FCI flow

[Ladirico]

Short description

In this PR, logic for polling the app's status has been added to the FCI flow.
This logic was added because there are cases where, at the end of the FCI flow, the PIN or biometric must be entered. On iOS, when biometrics are entered, the app enters the “inactive” state, and after biometrics are entered (when the identificationSuccess action is dispatched), the final call in the signature flow is made.
There are cases where the OS stops the call and then restarts it when the app is in the “inactive” state.
Polling is used to avoid these cases and to make the /signatures call only when the app returns to the “active” state, polling the state for up to 20 seconds. If the polling is not successful, we proceed anyway and accept the risk of the call being truncated. However, we expect these cases to be very rare (almost nonexistent).

List of changes proposed in this pull request

• Add polling logic
• Add test

Demo

Registrazione.schermo.2026-07-09.alle.10.22.53.mov

How to test

Run the application on iOS physical device (on simulators the app state not change)
Try if it works on Android devices too (on Android the state is always active)

[github-actions]

Jira Pull Request Link

This Pull Request refers to Jira issues:

• IEL-685

[github-actions]

PR Title Validation for conventional commit type

✅ All good! PR title follows the conventional commit type.

[codecov]

Codecov Report

❌ Patch coverage is 38.46154% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 62.92%. Comparing base (2b2cfad) to head (d69ee96).
⚠️ Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
apps/main-app/ts/features/fci/saga/index.ts	38.46%	8 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #8260   +/-   ##
=======================================
  Coverage   62.92%   62.92%           
=======================================
  Files        1963     1963           
  Lines       37239    37251   +12     
  Branches     6250     6253    +3     
=======================================
+ Hits        23431    23439    +8     
- Misses      12423    12428    +5     
+ Partials     1385     1384    -1     

Files with missing lines	Coverage Δ
apps/main-app/ts/features/fci/saga/index.ts	58.75% <38.46%> (-4.49%)	⬇️

... and 1 file with indirect coverage changes

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[soixdev91]

LGTM!