Snapshot: new training tasks (balanced generation), docs

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

tasks_gen/train/G1939/task.json

@@ -0,0 +1,56 @@
+{
+  "id": "G1939",
+  "category": "B",
+  "object_type": "TABL",
+  "difficulty": 3,
+  "release_target": "v816",
+  "expected_outcome": "implement",
+  "budget": {
+    "max_tool_calls": 60,
+    "max_activations": 15
+  },
+  "seed": [],
+  "contract": [
+    {
+      "type": "TABL",
+      "name": "{{P}}PLUCK",
+      "fields": [
+        "client",
+        "pluck_id",
+        "field_id",
+        "pluck_date",
+        "team_no",
+        "leaf_weight",
+        "leaf_grade",
+        "moisture",
+        "wither_min",
+        "price_per_kg",
+        "note"
+      ]
+    }
+  ],
+  "out_of_scope": [],
+  "hidden_tests": [
+    {
+      "type": "CLAS",
+      "name": "{{P}}PLUCK_HIDDEN",
+      "file": "hidden/pluck_hidden.clas.abap",
+      "description": "RTTI check of the table and OSQL test double checks"
+    }
+  ],
+  "reference": [
+    {
+      "type": "TABL",
+      "name": "{{P}}PLUCK",
+      "file": "reference/pluck.tabl.asabap",
+      "description": "Tea leaf plucking batch table"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}PLUCK_TEST",
+      "file": "reference/pluck_test.clas.abap",
+      "description": "Own ABAP Unit tests with CL_OSQL_TEST_ENVIRONMENT"
+    }
+  ],
+  "craft_checks": []
+}