Add station ID list file

README.md

@@ -28,6 +28,7 @@ TransitLM is a dataset for public transit route planning in Chinese urban enviro
 | `transit-lm-benchmark*-test.csv` | Anonymized SFT test splits for task evaluation | §2 |
 | `transit-lm-general-benchmark*-test.csv` | Real-world benchmark test sets (real station names + coordinates) | §1 |
 | `transit-lm-station-info.csv` | Static station-level reference information | — |
+| `transit-lm-station-ids.json` | Station ID list covering the released transit network | — |
 
 All released data follows the anonymization principles described in our paper. The sections below explain the data treatment and evaluation protocol for each component.