Update the ZonedDateTimeSerializer to be more lenient when deserializing

[david-livefront]

🎟️ Tracking

N/A

📔 Objective

A deserialization error occurred because a ciphers password history had a date using this format: 2025-03-19T10:34:50.025+00:00

This change makes our deserialization strategy more lenient with the timezone information style.

⏰ Reminders before review

• Contributor guidelines followed
• All formatters and local linters executed and passed
• Written new unit and / or integration tests where applicable
• Protected functional changes with optionality (feature flags)
• Used internationalization (i18n) for all UI strings
• CI builds passed
• Communicated to DevOps any deployment requirements
• Updated any necessary documentation (Confluence, contributing docs) or informed the documentation team

🦮 Reviewer guidelines

• 👍 (:+1:) or similar for great changes
• 📝 (:memo:) or ℹ️ (:information_source:) for notes or general info
• ❓ (:question:) for questions
• 🤔 (:thinking:) or 💭 (:thought_balloon:) for more open inquiry that's not quite a confirmed issue and could potentially benefit from discussion
• 🎨 (:art:) for suggestions / improvements
• ❌ (:x:) or ⚠️ (:warning:) for more significant problems or concerns needing attention
• 🌱 (:seedling:) or ♻️ (:recycle:) for future improvements or indications of technical debt
• ⛏ (:pick:) for minor or nitpick changes

[github-actions]

Checkmarx One – Scan Summary & Details – 70cbd876-ff90-423a-bd2a-1d6ca1733c7e

Great job! No new security vulnerabilities introduced in this pull request

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.36%. Comparing base (ad3a9a6) to head (753eca6).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6489   +/-   ##
=======================================
  Coverage   86.36%   86.36%           
=======================================
  Files         767      767           
  Lines       56034    56034           
  Branches     8151     8151           
=======================================
  Hits        48394    48394           
  Misses       4800     4800           
  Partials     2840     2840           

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