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/G0127/task.json

@@ -0,0 +1,60 @@
+{
+  "id": "G0127",
+  "category": "D",
+  "object_type": "CLAS",
+  "difficulty": 2,
+  "release_target": "v816",
+  "expected_outcome": "implement",
+  "budget": {
+    "max_tool_calls": 40,
+    "max_activations": 10
+  },
+  "seed": [
+    {
+      "type": "INTF",
+      "name": "{{P}}IF_FERRY_REASON",
+      "file": "files/seed/if_ferry_reason.intf.abap",
+      "description": "Reason type and reason codes for the ferry loading check"
+    }
+  ],
+  "contract": [
+    {
+      "type": "CLAS",
+      "name": "{{P}}CX_FERRY_ERROR"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}FERRY_LOAD_CHECK"
+    }
+  ],
+  "out_of_scope": [
+    "{{P}}IF_FERRY_REASON"
+  ],
+  "hidden_tests": [
+    {
+      "type": "CLAS",
+      "name": "{{P}}T02_HIDDEN",
+      "file": "files/hidden/t02_hidden.clas.abap",
+      "description": "T02 hidden tests"
+    }
+  ],
+  "reference": [
+    {
+      "type": "CLAS",
+      "name": "{{P}}CX_FERRY_ERROR",
+      "file": "files/reference/cx_ferry_error.clas.abap",
+      "description": "Class-based exception that carries the reason"
+    },
+    {
+      "type": "CLAS",
+      "name": "{{P}}FERRY_LOAD_CHECK",
+      "file": "files/reference/ferry_load_check.clas.abap",
+      "description": "Ferry loading check",
+      "testclasses_file": "files/reference/ferry_load_check.testclasses.abap"
+    }
+  ],
+  "craft_checks": [
+    "method_length",
+    "no_global_variables"
+  ]
+}