refactor(tpv): rowptr[T] 迁移 + D 表定长缓冲改精确分配 + SHA1 前缀判定收敛（D1/D3/D4/D5/D6/D7/C10）

App/lib/Phase/Phase1/Phase1Main.vp

@@ -243,7 +243,7 @@ def _BreakContainerCyclesInDeps(temp_dir: str) -> int:
 # Returns:
 #   ScanResult 指针（stdlib 分配，调用方负责释放）；失败返回 None
 # ============================================================
-def _BuildReachableResult(mb: memhub.MemBuddy | t.CPtr,
+def _BuildReachableResult(mb: rowptr[memhub.MemBuddy],
                           includes_dir: str) -> IncludesScanner.ScanResult | t.CPtr:
     """从 Sha1Store（仅可达 includes + App）构建可达 FileEntry 列表"""
     if mb is None:
@@ -335,7 +335,7 @@ def _BuildReachableResult(mb: memhub.MemBuddy | t.CPtr,
 # Returns:
 #   0 成功，非 0 失败
 # ============================================================
-def RunPhase1(mb: memhub.MemBuddy | t.CPtr, includes_dir: str, temp_dir: str,
+def RunPhase1(mb: rowptr[memhub.MemBuddy], includes_dir: str, temp_dir: str,
               log: VLogger.Logger | t.CPtr) -> int:
     """Phase1: 扫描 includes 目录，按需翻译并生成 stub"""
     if includes_dir is None or temp_dir is None: