CMCL-1631: FramingTransposer with a dead zone would sometimes drift

[glabute]

Purpose of this PR

CMCL-1361: FramingTransposer camera drift when nonzero dead zone.
Fix was to improve precision of calculation.

Testing status

• Added an automated test
• Passed all automated tests
• Manually tested

Documentation status

• Updated CHANGELOG
• Updated README (if applicable)
• Commented all public classes, properties, and methods
• Updated user documentation

Technical risk

low

[codecov-commenter]

⚠️ Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

Attention: Patch coverage is 50.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 27.21%. Comparing base (ba4cc2b) to head (323516c).
Report is 74 commits behind head on main.

Files with missing lines	Patch %	Lines
...Runtime/Deprecated/CinemachineFramingTransposer.cs	0.00%	1 Missing ⚠️

❗ Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1031      +/-   ##
==========================================
+ Coverage   26.97%   27.21%   +0.24%     
==========================================
  Files         254      254              
  Lines       28418    28485      +67     
==========================================
+ Hits         7665     7753      +88     
+ Misses      20753    20732      -21     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.