Bug fix: Convert dateTimes

[saulius-saltenis-Devoteam]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context.

I store UTC timestamps in DB, and pass ISO timestamps for filtering operations.
When ISO timestamp is passed, it's first converted to DateTime with additional local timezone offset. Later, it's Kind is set to UTC. This only changes the Kind property, retaining the previously added timezone ticks.

For this reason, the following request:

Turns into this query:

This behavior can be easily reproduced with the following sample, when environment has a timezone:

var dateTime = DateTime.Now;
Console.WriteLine(dateTime);

var utcDateTime = DateTime.SpecifyKind(dateTime, DateTimeKind.Utc);
Console.WriteLine(utcDateTime);

var utcDateTime2 = dateTime.ToUniversalTime();
Console.WriteLine(utcDateTime2);

Fixes # (issue)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have performed a self-review of my code
• I have added tests that prove my fix is effective or that my feature works
• I have made corresponding changes to the documentation
• I have commented my code, particularly in hard-to-understand areas
• New and existing unit tests pass locally with my changes

[what-the-diff]

PR Summary

• Improved DateTime Handling
  An update was made in the way the system interacts with dates and times. This was achieved by using a new approach that can adjust dates and times depending on the default setup of the system. This update provides better control when adjusting between local and international (UTC) times, ensuring accurate date and time information.

[alirezanet]

Hi @saulius-saltenis-Devoteam,
Looks good to me, but it would be nice if you add a couple of unit-tests to validate the old and new behavior

[saulius-saltenis-Devoteam]

Will add either later today, or tomorrow

[saulius-saltenis-Devoteam]

Added a test for ensuring that the final query filters with same timestamp as passed via input.
Added two more tests below, that showcase the problem with past conversions.

[alirezanet]

LGTM 💐👌 Thanks 🍻