Files
gost-x/chain
ginuerzh 50f4a6b096 x: close chainGroup probe goroutines on service shutdown
chainGroup.Close() existed but was never called: the group is wrapped
in a chain.Router held by the listener/handler, and service.Close()
only closed the handler, observer, and listener. Every SIGHUP reload
leaked the old config's probe goroutines permanently.

Wire the close path end to end:
- Router.Close() closes its chain when it implements io.Closer
- service ClosersOption registers io.Closers called on shutdown
- ParseService passes both routers via ClosersOption, and closes
  them on construction failure so probes started early don't leak
2026-07-28 23:14:27 +08:00
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