feat: ignore critical update on debug

[jvsena42]

This PR skips the critical update check on debug builds, so the blocking CriticalUpdate screen doesn't interfere during development.

Description

Adds an early return in the critical update flow when Env.isDebug is true, bypassing the remote release check entirely on debug builds.

Preview

N/A

QA Notes

1. Build a debug APK and launch — verify no critical update screen appears regardless of the remote release.json state
2. Build a release APK and verify the critical update check still works as expected

[claude]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.

[ovitrif]

Thanks, great idea! 🙌🏻

utAck