让免费层限流的报告跟真实限流一致，并给少一块结果的静默失败留下函数名和错误类型。

Co-Authored-By: Grok (agent loop)

scripts/yoga_engine.py

@@ -683,7 +683,7 @@ def _compiled_exec_code(expr):
         tree.body = _capture_tail_expr(tree.body)
         ast.fix_missing_locations(tree)
         return compile(tree, "<yoga_custom>", "exec")
-    except Exception:
+    except Exception:  # noqa: BLE001 - a custom rule expression is expected to fail; that rule is skipped
         return None
 
 
@@ -700,7 +700,7 @@ def _run_custom_expr(expr, exec_globals):
             result = eval(code, exec_globals, exec_globals)
         except SyntaxError:
             code = None  # 运行期 SyntaxError：与改前一样退到多语句分支
-        except Exception:
+        except Exception:  # noqa: BLE001 - a custom rule expression is expected to fail; that rule is skipped
             return None
     if code is None:
         exec_code = _compiled_exec_code(expr)
@@ -708,7 +708,7 @@ def _run_custom_expr(expr, exec_globals):
             try:
                 exec(exec_code, exec_globals, exec_globals)
                 result = exec_globals.get("__result__")
-            except Exception:
+            except Exception:  # noqa: BLE001 - a custom rule expression is expected to fail; that rule is skipped
                 return None
     return result