update: Session-lifetime/scoped を Pod-lifetime に修正

タスクストア/ファイルトラッカーは compaction を跨いで Pod プロセス寿命まで生きる。
旧 SessionId = Segment の時代の表現を Pod-lifetime に正す。pod_cli の表示も Segment: に。

crates/tools/src/task.rs

@@ -1,4 +1,4 @@
-//! Session-scoped TaskStore and builtin task tools.
+//! Pod-lifetime TaskStore and builtin task tools.
 //!
 //! The store is Pod/session-lifetime state shared by the four Task* tools. It
 //! is reconstructed on resume by replaying TaskCreate / TaskUpdate tool-call

crates/tools/src/tracker.rs

@@ -1,4 +1,4 @@
-//! Session-scoped tracker for file operations performed by the builtin
+//! Pod-lifetime tracker for file operations performed by the builtin
 //! file-manipulation tools.
 //!
 //! A `Tracker` serves two orthogonal purposes: