feat(ship): clarify delivery stop semantics

skills/ship/scripts/ship_lib.py

@@ -48,6 +48,18 @@ DELIVERY_STATE = frozenset(
         "deployed",
     }
 )
+# User-facing stop points. The two legacy names remain accepted so existing
+# ship records continue to resolve to the new phase meanings.
+STOP_AT_STATE = {
+    "develop_verified": "verified",
+    "review_ready": "pr_opened",
+    "release_ready": "regression_passed",
+    "released": "published",
+    "deployed": "deployed",
+    "verified": "verified",  # legacy alias for develop_verified
+    "validation_ready": "regression_passed",  # legacy alias for release_ready
+}
+STOP_AT = frozenset(STOP_AT_STATE)
 SOURCE_KIND = frozenset({"user", "hunt", "ack", "pr", "feishu"})
 COMMIT_ROLE = frozenset({"baseline", "merged", "head"})