chore(dbg): 补语句级与调用级探针（stmt.kind / call.enter fn）

崩点已收窄到 Check 函数体内的翻译，这两个探针把范围压到具体语句与具体被调者。均为 TEMP，定位后移除。

App/lib/core/Gen/Call/CallGenMixin.vp

@@ -94,6 +94,8 @@ novirtual class CallGenMixin(CallGenBase.CallGenBase):
     def translate_call(self, pool: memhub.MemBuddy*, builder: mlirlite.IRBuilder*, mod: mlirlite.LLVMModule*, node: ast.AST*, funcs_ptr: t.CPtr, func_count: int, trans: HT.Translator* = None) -> mlirlite.Value*:
         """Translate a Call node and return the result Value."""
         cl: ast.Call* = ast.Call*(node)
+        # [TEMP dbg] 阶段日志：定位到具体调用（定位后移除）
+        VLogger.info(f"call.enter fn={self.Gen.ExprGenBase.get_func_name(cl.func)}", "TR")
         # Static symbols must not be used cross-module: fail fast on mod.fn(...) hitting another
         # module's static; the check lives in _CheckStaticCallCrossModule to keep this huge function inferable.
         self._CheckStaticCallCrossModule(pool, trans, cl)

App/lib/core/Gen/Stmt/StmtGenMixin.vp

@@ -27,6 +27,8 @@ novirtual class StmtGenMixin(StmtGenDeclMixin.StmtGenDeclMixin):
 
     def translate_stmt(self, trans: HT.Translator*, node: ast.AST*) -> int:
         """Translate a single statement with a depth guard; returns the number of new variables"""
+        # [TEMP dbg] 阶段日志：语句级（定位崩溃到具体语句，定位后移除）
+        if node is not None: VLogger.info(f"stmt.kind={node.kind()}", "TR")
         if trans is not None:
             # --traceback: statement-level DWARF location (no-op outside a DI-attached
             # define). Every instruction then carries ", !dbg !N".