feat(motor): 自适应 PDO 窗口与通道活动指示，新增原生 SOEM 时序诊断

后端 PDO 循环改为按在线槽收缩状态窗口，稀疏总线下单槽每周期都能刷新，
并补上尾部槽的发现扫描游标；新增自旋节拍源（阈值/显式覆盖）、P 核识别
与线程级钉核，自旋期间释放 GIL 以免 HTTP 线程被饿死；启动时先关停旧实例，
避免两个进程争用 Npcap 适配器。

记录每拍完整时间线、GC stop-the-world 事件与网格跳拍数，经 /api/motor/dbg
导出用于归因固定频率的超时；配

build_native/wpcap.def

@@ -0,0 +1,121 @@
+LIBRARY wpcap
+EXPORTS
+bpf_dump
+bpf_filter
+bpf_image
+bpf_validate
+eproto_db
+pcap_activate
+pcap_breakloop
+pcap_bufsize
+pcap_can_set_rfmon
+pcap_close
+pcap_compile
+pcap_compile_nopcap
+pcap_create
+pcap_createsrcstr
+pcap_datalink
+pcap_datalink_ext
+pcap_datalink_name_to_val
+pcap_datalink_val_to_description
+pcap_datalink_val_to_description_or_dlt
+pcap_datalink_val_to_name
+pcap_dispatch
+pcap_dump
+pcap_dump_close
+pcap_dump_file
+pcap_dump_flush
+pcap_dump_ftell
+pcap_dump_ftell64
+pcap_dump_hopen
+pcap_dump_open
+pcap_dump_open_append
+pcap_ether_aton
+pcap_ether_hostton
+pcap_file
+pcap_fileno
+pcap_findalldevs
+pcap_findalldevs_ex
+pcap_free_datalinks
+pcap_free_tstamp_types
+pcap_freealldevs
+pcap_freecode
+pcap_get_airpcap_handle
+pcap_get_tstamp_precision
+pcap_geterr
+pcap_getevent
+pcap_getnonblock
+pcap_hopen_offline
+pcap_hopen_offline_with_tstamp_precision
+pcap_init
+pcap_inject
+pcap_is_swapped
+pcap_lib_version
+pcap_list_datalinks
+pcap_list_tstamp_types
+pcap_live_dump
+pcap_live_dump_ended
+pcap_lookupdev
+pcap_lookupnet
+pcap_loop
+pcap_major_version
+pcap_minor_version
+pcap_nametoaddr
+pcap_nametoaddrinfo
+pcap_nametoeproto
+pcap_nametollc
+pcap_nametonetaddr
+pcap_nametoport
+pcap_nametoportrange
+pcap_nametoproto
+pcap_next
+pcap_next_etherent
+pcap_next_ex
+pcap_offline_filter
+pcap_oid_get_request
+pcap_oid_set_request
+pcap_open
+pcap_open_dead
+pcap_open_dead_with_tstamp_precision
+pcap_open_live
+pcap_open_offline
+pcap_open_offline_with_tstamp_precision
+pcap_parsesrcstr
+pcap_perror
+pcap_remoteact_accept
+pcap_remoteact_accept_ex
+pcap_remoteact_cleanup
+pcap_remoteact_close
+pcap_remoteact_list
+pcap_sendpacket
+pcap_sendqueue_alloc
+pcap_sendqueue_destroy
+pcap_sendqueue_queue
+pcap_sendqueue_transmit
+pcap_set_buffer_size
+pcap_set_datalink
+pcap_set_immediate_mode
+pcap_set_promisc
+pcap_set_rfmon
+pcap_set_snaplen
+pcap_set_timeout
+pcap_set_tstamp_precision
+pcap_set_tstamp_type
+pcap_setbuff
+pcap_setdirection
+pcap_setfilter
+pcap_setmintocopy
+pcap_setmode
+pcap_setnonblock
+pcap_setsampling
+pcap_setuserbuffer
+pcap_snapshot
+pcap_stats
+pcap_stats_ex
+pcap_statustostr
+pcap_strerror
+pcap_tstamp_type_name_to_val
+pcap_tstamp_type_val_to_description
+pcap_tstamp_type_val_to_name
+pcap_version
+pcap_wsockinit