feat(inbound): excludeFromSub hides links without disabling (#6463)

* feat(inbound): excludeFromSub hides links without disabling

Add a per-inbound flag that omits subscription output while keeping the
inbound enabled for Xray, auth, and traffic accounting. Fixes #6435.

* fix(inbound): excludeFromSub review follow-ups

gofumpt model.go, sync docs OpenAPI, keep excludeFromSub master-authored
on node mirror, and exercise the legacy add-column migration path in tests.

* fix(sub): keep excluded inbounds' clients in the usage header

The excludeFromSub filter sat in getInboundsBySubId's SQL, so an excluded
inbound's clients never reached seenEmails in the raw, Clash or JSON
renderer. A client that lives only on a hidden inbound (one client per
inbound sharing a subId) dropped out of the Subscription-Userinfo usage,
quota and expiry and out of the info-node state, while the inbound kept
serving it and counting its traffic.

The query returns every enabled inbound again; each renderer skips an
excluded inbound's links but still counts its clients, the same rule the
Clash renderer already applies to external links it cannot express.

---------

Co-authored-by: mrchatam <mrchatam@users.noreply.github.com>
Co-authored-by: MHSanaei <ho3ein.sanaei@gmail.com>

internal/web/service/inbound_node.go

@@ -412,6 +412,8 @@ func adoptedWireInbound(c, snapIb *model.Inbound, adoptedSettings string) *model
 	a.Enable = snapIb.Enable
 	a.Remark = snapIb.Remark
 	a.SubSortIndex = normalizeSubSortIndex(snapIb.SubSortIndex)
+	// ExcludeFromSub stays master-authored: older nodes omit the field and
+	// would otherwise reset it to false on every heartbeat mirror.
 	a.Listen = snapIb.Listen
 	a.Port = snapIb.Port
 	a.Protocol = snapIb.Protocol
@@ -736,6 +738,7 @@ func (s *InboundService) setRemoteTrafficLocked(nodeID int, snap *runtime.Traffi
 				Enable:               snapIb.Enable,
 				Remark:               snapIb.Remark,
 				SubSortIndex:         normalizeSubSortIndex(snapIb.SubSortIndex),
+				ExcludeFromSub:       snapIb.ExcludeFromSub,
 				Total:                snapIb.Total,
 				ExpiryTime:           snapIb.ExpiryTime,
 				Up:                   snapIb.Up,