Separate transactions from main dataset for viewer compatibility

- US/, NG/, IN/, BR/: credit_profiles.parquet (user-level, 30 cols) + metadata
- transactions/: raw transaction data (US.parquet, NG.parquet, IN.parquet, BR.parquet)

README.md

@@ -53,14 +53,15 @@ The **Electric Sheep Alternative Credit Dataset** is a synthetic dataset for mod
 
 ## Files Per Region
 
-Each region contains **3 files**:
+Each region contains **2 files** in `{region}/`:
 
 | File | Description |
 |------|-------------|
-| `credit_profiles.parquet` | User-level profiles with demographics, 19 behavioral features, and credit labels (1 row per user) |
-| `transactions.parquet` | Raw financial behavior over 12–24 months (~900 transactions per user) |
+| `credit_profiles.parquet` | User-level profiles with demographics, 19 behavioral features, and credit labels (1 row per user, 30 columns) |
 | `metadata.json` | Generation statistics |
 
+**Raw transactions** are in `transactions/{region}.parquet` (separate download, ~900 transactions per user).
+
 ## Loading the Dataset
 
 ```python