fix: update reset method in TapeService to use session/start for handoff

Signed-off-by: Frost Ming <me@frostming.com>

Author: frostming

src/bub/tape/service.py

@@ -111,7 +111,7 @@ def reset(self, *, archive: bool = False) -> str:
         state = {"owner": "human"}
         if archive_path is not None:
             state["archived"] = str(archive_path)
-        self._tape.handoff("session/reset", state=state)
+        self._tape.handoff("session/start", state=state)
         return f"Archived: {archive_path}" if archive_path else "ok"
 
     def anchors(self, *, limit: int = 20) -> list[AnchorSummary]: