Flatten submit package structure

submit/model/c6_pointmask.py

@@ -0,0 +1,8 @@
+"""C6 diagnostic: train with independent point masks instead of spans."""
+from .c6 import C6
+
+
+class C6PointMask(C6):
+    """Use the C6 forward pass with mask_kind='point' during fitting."""
+
+    training_mask_kind = "point"