chore(release): align v2 format package with alpha.5

packages/session/session-format-v1-to-v2/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@deepseek-ai/dsh-session-format-v1-to-v2",
   "description": "Frozen released-v1 Session codec and assistant-stream migration to v2",
-  "version": "0.1.2-alpha.4",
+  "version": "0.1.2-alpha.5",
   "publishConfig": {
     "access": "public"
   },