chore(dbg): 形参注册与 pre-scan 之间补 p1c 探针（TEMP）

add_var 三次全过（esz=56），崩点在其后。p1c 夹出 L700-763（状态保存）与 L765-775（pre-scan）两段。

App/lib/core/Gen/Func/FuncGenDef.vp

@@ -760,7 +760,8 @@ novirtual class FuncGenDef(CallGenBase.CallGenBase):
         GenApi.clear_scope_names(trans)
         # Reset the in-chain nonlocal heap prebuild flag (built once per function; multiple nested function definitions
         # share one heap, preventing repeated malloc + double VarEntry redirection).
-        trans._nl_chain_done = 0
+        trans._nl_chain_done = 0
+        VLogger.info("TR.p1c.state.saved", "TR")
 
         # Pre-scan the body: 1) Global/Nonlocal declarations first (Python semantics: they apply to the whole function
         # scope regardless of position, so register before any assignment); 2) AnnAssign to create local allocas early.