Add retrained PolyEdit checkpoint and audit artifacts

training_report.json

@@ -0,0 +1,119 @@
+{
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+      33
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+      51
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+    "Ei": [
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+      45
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+    "Xc": [
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+      41
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+  "initialization": {
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+    "loaded_tensors": 258,
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+      "src_embed.0.lut.weight",
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+  "sampling_alpha": 0.0,
+  "train_examples": 152036,
+  "validation_examples": 362,
+  "model_label": "Molecular Optimization Transformer polymer-adapted"
+}