Fix update banner display issue for successful updates

[Gabriel Dufresne (GabrielDuf)]

This pull request improves the reliability and correctness of the update logging and orphaned update detection logic in both UniGetUI and UniGetUI.Avalonia. The changes ensure that update log files are written atomically to prevent corruption, enhance version comparison logic to handle version strings with trailing zeros, and improve the clarity of log messages during orphaned update detection.

Version comparison improvements:

• Introduced a new VersionsMatch method in both codebases to normalize version strings (e.g., treating "2026.1.11" and "2026.1.11.0" as equal), improving the accuracy of update attempt status checks.

Orphaned update attempt detection and logging:

• Updated the orphaned update detection logic to:
  • Properly handle cases where no target version is recorded, skipping unnecessary warnings.
  • Use the new VersionsMatch method for more robust version equality checks. [
  • Improve warning and info log messages for better clarity and context.

[Maxime Forest (forestmaxime)]

LGTM