SG-43652 [Phase 2] Migrate FlowAM integration

[carlos-villavicencio-adsk]

Base branch #89

Requirements

Same as shotgunsoftware/tk-multi-loader2#145

TODO

• Analyze flowam_scene_operations hook and see how it can be merged with the existing hooks
• Test on Maya
• Review CI
• Remove tk_core_ref from azure-pipelines.yml

[codecov]

Codecov Report

❌ Patch coverage is 25.00000% with 33 lines in your changes missing coverage. Please review.
✅ Project coverage is 28.73%. Comparing base (9b803dd) to head (b86410d).

Files with missing lines	Patch %	Lines
python/tk_multi_breakdown2/api/manager.py	20.68%	23 Missing ⚠️
python/tk_multi_breakdown2/file_item_model.py	0.00%	5 Missing ⚠️
python/tk_multi_breakdown2/dialog.py	0.00%	2 Missing ⚠️
python/tk_multi_breakdown2/file_history_model.py	0.00%	2 Missing ⚠️
app.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@                        Coverage Diff                         @@
##           ticket/SG-43444_medm_migration      #91      +/-   ##
==================================================================
- Coverage                           28.76%   28.73%   -0.04%     
==================================================================
  Files                                  19       19              
  Lines                                2263     2290      +27     
==================================================================
+ Hits                                  651      658       +7     
- Misses                               1612     1632      +20     

Flag	Coverage Δ
Linux	28.73% <25.00%> (-0.04%)	⬇️
Python-3.10	28.73% <25.00%> (-0.04%)	⬇️
Python-3.11	28.73% <25.00%> (-0.04%)	⬇️
Python-3.13	28.73% <25.00%> (-0.04%)	⬇️
Python-3.9	28.73% <25.00%> (-0.04%)	⬇️
Windows	28.73% <25.00%> (-0.04%)	⬇️
macOS	28.73% <25.00%> (-0.04%)	⬇️

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[yungsiow]

Fixes look good, thanks Charlie!