Fix extra args command parsing used by Metadata migration

[peternied]

Description

Fix extra args command parsing used by Metadata migration

Testing

Added a new test case that validates all the end cases

Check List

• New functionality includes testing
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented
• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

Attention: Patch coverage is 92.00000% with 2 lines in your changes missing coverage. Please review.

Project coverage is 78.69%. Comparing base (d40e53b) to head (84cbe46).
Report is 14 commits behind head on main.

Files with missing lines	Patch %	Lines
...e/lib/console_link/console_link/models/metadata.py	92.00%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #931      +/-   ##
============================================
+ Coverage     78.63%   78.69%   +0.06%     
+ Complexity     2365     2361       -4     
============================================
  Files           368      368              
  Lines         14223    14241      +18     
  Branches        827      827              
============================================
+ Hits          11184    11207      +23     
+ Misses         2523     2513      -10     
- Partials        516      521       +5     

Flag	Coverage Δ
gradle-test	74.98% <ø> (+0.04%)	⬆️
python-test	88.63% <92.00%> (+0.07%)	⬆️

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