Snapshot: new training tasks (balanced generation), docs

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

tasks_gen/train/G1918/generation.json

@@ -0,0 +1,39 @@
+{
+ "id": "G1918",
+ "pool": "train",
+ "object_type": "INTF",
+ "category": "A",
+ "attempts": [
+  {
+   "stage": "bundle",
+   "errors": [
+    "hidden/t02_hidden.clas.abap line 62: syntax error for release v758 (abaplint): Statement does not exist in the configured ABAP version(or a parser error), \"5\"",
+    "reference/bouquet_if_test.clas.abap line 59: syntax error for release v758 (abaplint): Statement does not exist in the configured ABAP version(or a parser error), \"5\""
+   ],
+   "by_check": {
+    "abaplint": 2
+   }
+  },
+  {
+   "stage": "validate",
+   "oracle": 0,
+   "null": 0
+  },
+  {
+   "stage": "validate",
+   "oracle": 80.6,
+   "null": 0
+  },
+  {
+   "stage": "validate",
+   "oracle": 100.0,
+   "null": 0,
+   "mutation": {
+    "valid": 4,
+    "killed": 4,
+    "ok": true
+   }
+  }
+ ],
+ "accepted": true
+}