ModelTranslator: 编排层兜底意外异常 + 警告消息收敛（审查修复）

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Tools/ModelTranslator/rizom_unwrap.py

@@ -16,7 +16,7 @@ class RizomError(Exception):
 
 
 def candidate_paths(cli_arg=None, env_val=None, reg_val=None, default=DEFAULT_RIZOM):
-    """rizomuv.exe 候选路径，优先级：CLI 参数 > 环境变量 > 注册表 > 默认安装位置。"""
+    """rizomuv.exe 自动发现候选：环境变量 > 注册表 > 默认安装位置（显式 CLI 路径走独占分支不进此链）。"""
     return [p for p in (cli_arg, env_val, reg_val, default) if p]
 
 
@@ -115,7 +115,7 @@ def rizom_unwrap(fbx_path, exe, map_res=MAP_RES, padding_px=PADDING_PX):
     last = None
     for attempt in range(1 + RETRY):
         if attempt:
-            print("[警告] RizomUV 第 %d 次失败（%s），换新实例重试" % (attempt, last))
+            print("[警告] RizomUV 第 %d 次失败，换新实例重试" % attempt)
         try:
             return _unwrap_once(mod, exe, fbx_abs, map_res, pad_uv)
         except RizomError as e:
@@ -124,7 +124,10 @@ def rizom_unwrap(fbx_path, exe, map_res=MAP_RES, padding_px=PADDING_PX):
 
 
 def _unwrap_once(mod, exe, fbx_abs, map_res, pad_uv):
-    link = mod.CRizomUVLink()
+    try:
+        link = mod.CRizomUVLink()
+    except Exception as e:   # 构造失败也归一为 RizomError，维持"失败只抛 RizomError"契约
+        raise RizomError("RizomUVLink 实例创建失败：%s" % e)
     try:
         _call("RunRizomUV", lambda _p: link.RunRizomUV(exePath=exe), None, timeout=60)
     except RizomError as e: