John Pollock bd672479fa refactor: eliminate circular import by separating model management functions ...

- Create model_management_mgpu.py for centralized model lifecycle tracking
- Move memory management functions from device_utils.py to new module:
  * multigpu_memory_log, track_modelpatcher, trigger_executor_cache_reset
  * check_cpu_memory_threshold, prune_distorch_stores, try_malloc_trim
  * force_full_system_cleanup
- Update imports across codebase (distorch_2.py, distorch.py, __init__.py,
  nodes.py, checkpoint_multigpu.py)
- Resolves device_utils.py ↔ distorch_2.py circular dependency
- Follows established clean coding patterns with fail-fast error handling

Addresses critical CPU memory leak investigation infrastructure by ensuring
proper module separation for comprehensive memory management utilities.

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..

activeContext.md

docs: add development rules and project context in .clinerules

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comfyui-lineage.md

docs: add development rules and project context in .clinerules

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performance-benchmarks.md

docs: add development rules and project context in .clinerules

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productContext.md

docs: add development rules and project context in .clinerules

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progress.md

docs: add development rules and project context in .clinerules

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projectbrief.md

docs: add development rules and project context in .clinerules

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systemPatterns.md

refactor: eliminate circular import by separating model management functions

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techContext.md

docs: add development rules and project context in .clinerules

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