feat: add shared child batch creation

mappings/lifecycle.mapping.json

@@ -1,7 +1,7 @@
 {
   "contract_version": "ltjt-lifecycle-v2.9-roster-leader-contact-2026-08",
   "current_agent_parse_prompt_version": "ltjt-agent-prompt-v1.8-independent-headcount-categories",
-  "current_extension_version": "0.5.169",
+  "current_extension_version": "0.5.170",
   "historical_test_marker": "TEST-202609",
   "scope": "/System/Business/",
   "erp_session_keepalive": {
@@ -94,7 +94,7 @@
       "declared formats and narrow capability scope"
     ],
     "erp_resolution_requires": [
-      "exactly one target object from a user-visible identifier",
+      "exactly one target object from a user-visible identifier, or one complete non-empty shared-plan target set for Program-only shared-child batch creation",
       "ERP-derived kind/tid and applicable ddid",
       "exactly one resource candidate when the operation uses a named ERP resource",
       "fresh current status and current values when required"
@@ -136,6 +136,7 @@
       "shared_plan_create without multi-date split_order facts",
       "multi-date shared_plan_create with split_order customer/passenger facts: E2E3 and E2E4 each produced one concrete child per date with persisted customer and 15+1",
       "shared_child_order_create for one exact parent",
+      "shared_child_order_batch_create resolves every product-matching parent in the inclusive date range before sequentially reusing the exact-parent child adapter",
       "passenger_list_import full-list first_import or confirmed full_replace",
       "five arrangement create/clear operations at status 未确认",
       "arrangement_hotel update for one exact 未确认 row: end_date and room_count only",