Replace per-project files with combined data/train.jsonl (746 rows) + dataset card

README.md

@@ -35,11 +35,14 @@ Each row corresponds to a single (project, `rev1` → `rev2`) pair. Inside the r
 
 | | |
 |---|---|
-| Rows | 746 |
+| Tasks (rows) | 746 |
+| Test methods | 1,961 |
 | Source projects | 84 distinct Java repositories on GitHub |
 | Java versions | 8, 11, 17, 21 |
 | Build system | Maven |
-| Total size | ~10 MB |
+| Total size | ~8 MB |
+
+A **task** is one (project, rev1 → rev2) pair — the unit a model is asked to operate on. A **test method** is one entry inside that task's `test_changes` list — a single `@Test` method that was added or modified at `rev2`. One task may contain several related test methods written together; benchmarks can be reported at either granularity.
 
 ## Schema