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/G0108/task.json

@@ -0,0 +1,59 @@
+{
+  "id": "G0108",
+  "category": "B",
+  "object_type": "DDLS",
+  "difficulty": 2,
+  "release_target": "v816",
+  "expected_outcome": "implement",
+  "budget": {
+    "max_tool_calls": 40,
+    "max_activations": 10
+  },
+  "seed": [
+    {
+      "type": "TABL",
+      "name": "{{P}}CALLS",
+      "file": "seed/calls.tabl.asabap",
+      "description": "Phone calls"
+    }
+  ],
+  "contract": [
+    {
+      "type": "DDLS",
+      "name": "{{P}}I_CALL_CHARGE",
+      "fields": [
+        "CALL_ID",
+        "CUSTOMER",
+        "BILLABLE_MIN",
+        "RATE",
+        "CHARGE"
+      ]
+    }
+  ],
+  "out_of_scope": [
+    "{{P}}CALLS"
+  ],
+  "hidden_tests": [
+    {
+      "type": "CLAS",
+      "name": "{{P}}T16_HIDDEN",
+      "file": "hidden/t16_hidden.clas.abap",
+      "description": "T16 hidden tests"
+    }
+  ],
+  "reference": [
+    {
+      "type": "DDLS",
+      "name": "{{P}}I_CALL_CHARGE",
+      "file": "reference/i_call_charge.ddls.asddls",
+      "description": "Call charge"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}T16_TEST",
+      "file": "reference/t16_test.clas.abap",
+      "description": "T16 own tests"
+    }
+  ],
+  "craft_checks": []
+}