Fix coverage with several contract classes; table annotation and file path checks; clean task dir on write

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014aUaQeLnwbb1zTpN7kHeat

tasks_gen/eval/G0124/task.json

@@ -0,0 +1,68 @@
+{
+  "id": "G0124",
+  "category": "C",
+  "object_type": "PROG",
+  "difficulty": 2,
+  "release_target": "v758",
+  "expected_outcome": "implement",
+  "budget": {
+    "max_tool_calls": 40,
+    "max_activations": 10
+  },
+  "seed": [
+    {
+      "type": "TABL",
+      "name": "{{P}}FARM",
+      "file": "seed/farm.tabl.asabap",
+      "description": "Farms of the cooperative"
+    },
+    {
+      "type": "TABL",
+      "name": "{{P}}MILK",
+      "file": "seed/milk.tabl.asabap",
+      "description": "Milk deliveries"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}T20_SEED",
+      "file": "seed/t20_seed.clas.abap",
+      "description": "T20 seed data",
+      "run": true
+    }
+  ],
+  "contract": [
+    {
+      "type": "PROG",
+      "name": "{{P}}MILK_SUM",
+      "parameters": [
+        "p_from",
+        "p_to",
+        "s_reg"
+      ]
+    }
+  ],
+  "out_of_scope": [
+    "{{P}}FARM",
+    "{{P}}MILK"
+  ],
+  "hidden_tests": [
+    {
+      "type": "CLAS",
+      "name": "{{P}}T20_HIDDEN",
+      "file": "hidden/t20_hidden.clas.abap",
+      "description": "T20 hidden tests"
+    }
+  ],
+  "reference": [
+    {
+      "type": "PROG",
+      "name": "{{P}}MILK_SUM",
+      "file": "reference/milk_sum.prog.abap",
+      "description": "Milk litres per farm"
+    }
+  ],
+  "craft_checks": [
+    "db_operation_in_loop",
+    "method_length"
+  ]
+}