hscontrol/util/zlog/zf: add tag, authkey, and route constants
Add new zerolog field constants for improved logging consistency:
- Tag fields: CurrentTags, RemovedTags, RejectedTags, NewTags, OldTags,
IsTagged, WasAuthKeyTagged
- Node fields: ExistingNodeID
- AuthKey fields: AuthKeyID, AuthKeyUsed, AuthKeyExpired, AuthKeyReusable,
NodeKeyRotation
- Route fields: RoutesApprovedOld, RoutesApprovedNew, OldAnnouncedRoutes,
NewAnnouncedRoutes, ApprovedRoutes, OldApprovedRoutes, NewApprovedRoutes,
AutoApprovedRoutes, AllApprovedRoutes, RouteChanged
e0a436cefc