Snapshot: new training tasks (balanced generation), docs

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

tasks_gen/train/G1915/task.json

@@ -0,0 +1,54 @@
+{
+  "id": "G1915",
+  "category": "B",
+  "object_type": "TABL",
+  "difficulty": 2,
+  "release_target": "v816",
+  "expected_outcome": "implement",
+  "budget": {
+    "max_tool_calls": 60,
+    "max_activations": 15
+  },
+  "seed": [],
+  "contract": [
+    {
+      "type": "TABL",
+      "name": "{{P}}GRH",
+      "fields": [
+        "client",
+        "harvest_id",
+        "vineyard_id",
+        "grape",
+        "harvest_date",
+        "crates",
+        "weight_kg",
+        "grade",
+        "organic"
+      ]
+    }
+  ],
+  "out_of_scope": [],
+  "hidden_tests": [
+    {
+      "type": "CLAS",
+      "name": "{{P}}GRH_HIDDEN",
+      "file": "hidden/grh_hidden.clas.abap",
+      "description": "Hidden tests: DDIC field list of the table and Open SQL test doubles"
+    }
+  ],
+  "reference": [
+    {
+      "type": "TABL",
+      "name": "{{P}}GRH",
+      "file": "reference/grh.tabl.asabap",
+      "description": "Grape harvest records"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}GRH_TEST",
+      "file": "reference/grh_test.clas.abap",
+      "description": "Own tests for the table"
+    }
+  ],
+  "craft_checks": []
+}