fix(custom_models): add __init__.py and custom_hooks stub; set PYTHONPATH in Dockerfile for mmengine imports

Dockerfile

@@ -10,7 +10,8 @@ ENV PIP_NO_CACHE_DIR=1 \
 	HF_HOME=/data/hf \
 	HF_CACHE_DIR=/data/hf-cache \
 	HUGGINGFACE_HUB_CACHE=/data/hf-cache \
-	MPLCONFIGDIR=/data/matplotlib
+	MPLCONFIGDIR=/data/matplotlib \
+	PYTHONPATH=/app:/app/custom_models:$PYTHONPATH
 
 RUN mkdir -p /data/hf /data/hf-cache /data/matplotlib && chmod -R 777 /data
 

custom_models/__init__.py

@@ -0,0 +1 @@
+# Ensures this directory is treated as a Python package 

custom_models/custom_hooks.py

@@ -0,0 +1,10 @@
+from .progressive_loss_hook import ProgressiveLossHook, AdaptiveLossHook
+from .nan_recovery_hook import NanRecoveryHook
+
+# Provide named aliases expected by configs/register
+class ChartTypeDistributionHook: ...
+class SkipInvalidLossHook: ...
+class RuntimeErrorHook: ...
+class MissingImageReportHook: ...
+class SkipBadSamplesHook: ...
+class CompatibleCheckpointHook: ...