Add placeholder docstring column for schema consistency

- Added empty string docstring column as placeholder
- Ensures compatibility when training across all prover datasets
- Real docstrings to be extracted and added in future update
- Prevents training errors from schema mismatch

README.md

@@ -1,17 +1,44 @@
 ---
 license: bsd-3-clause
 tags:
-  - theorem-proving
-  - formal-methods
-  - isabelle
-  - hol
+- theorem-proving
+- formal-methods
+- isabelle
+- hol
 task_categories:
-  - text-generation
-  - feature-extraction
+- text-generation
+- feature-extraction
 language:
-  - en
+- en
 size_categories:
-  - 10K<n<100K
+- 10K<n<100K
+configs:
+- config_name: default
+  data_files:
+  - split: train
+    path: data/train-*
+dataset_info:
+  features:
+  - name: fact
+    dtype: string
+  - name: type
+    dtype: string
+  - name: library
+    dtype: string
+  - name: imports
+    list: string
+  - name: filename
+    dtype: string
+  - name: symbolic_name
+    dtype: string
+  - name: docstring
+    dtype: string
+  splits:
+  - name: train
+    num_bytes: 42579196
+    num_examples: 78022
+  download_size: 10644094
+  dataset_size: 42579196
 ---
 
 # Isabelle-Stdlib

data/train-00000-of-00001.parquet

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:b5181b23b2e78ded9df99d9139c754ca894b68b3baefa491dc3f67462bb783ff
-size 10643696
+oid sha256:12dd1cd4b7834f1d499b992274c334dd890f06d376f0fa35d611c85d9b1f57d9
+size 10644094