Change entity_to_token to list-of-objects schema; update README accordingly

README.md

@@ -43,7 +43,7 @@ Each example includes: the NLQ, database identifier, a canonical dataset id, the
   - `id` *(int)* — Local entity id (unique within the example)
   - `type` *("table"|"column"|"value")*
   - `value` *(str)* — Surface form from the DB schema or literal value
-- `entity_to_token` *(Dict[str, List[int]])* — Mapping entity to token
+- `entity_to_token` *(List[Object])* — Each item has: `entity_id` *(int)*, `token_idxs` *(List[int])*
 - `dber_tags` *(List[str])* — **CoNLL-style IOB2** tags over `tokens`
 
 ---

synthetic_train.jsonl

@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:1e06a98bc289b05fb179d7bb5857cc28746e0fa9755e5c9464b7cd266f5450a3
-size 17048559
+oid sha256:80207b3be9163d39b992d5bc21edbe2b737b14b6a00d1fd541db84f1f25be0a3
+size 25162599