fix(translator,peephole): TPC 属性链解析修复与窥孔 T1-T3 收尾

- TPC(lib/core): 泛型父特化形参按声明类登记 var_struct_class; _find_struct_key 键归一支持方括号内嵌 sha 前缀; 字段探测失败不再冒泡 FuncGen fail-fast; cast 局部通用指针槽按静态类 bitcast; 属性解析失败附诊断
- 窥孔(includes/llvmlite/__function.vp): 窥孔移至 Renumber 前使输出 SSA 编号连续; T3 no-op bitcast 消除; T4(数组 bitcast->GEP)验证干扰返回类型收敛已移除
- 附调试打点与 1.log

lib/core/LLVMCG/FuncGen.py

@@ -3,6 +3,7 @@ from typing import Any
 import vast as ast
 import os
 import re
+import sys
 import llvmlite.ir as ir
 from lib.core.Handles.HandlesBase import CTypeInfo
 from lib.core.VLogger import get_logger as _vlog
@@ -502,6 +503,11 @@ class FuncGenMixin:
             if isinstance(_st_diag, ir.IdentifiedStructType):
                 _struct_diag = f"{len(_st_diag.elements)} elems" if _st_diag.elements is not None else 'opaque'
         _member_names_diag: list = [n for n, _ in _members_diag][:16]
+        try:
+            import traceback as _tb
+            _tb.print_stack(file=sys.stderr)
+        except Exception:
+            pass
         raise KeyError(
             f"[fast-fail] 属性 '{field_name}' 在类 '{ClassName}' 中找不到"
             f"（class_members={len(_members_diag)} 个: {_member_names_diag}, struct={_struct_diag}）"