feat: evolve rate-filter to a more generic filter

internal/corecfg/manager.go

@@ -374,10 +374,15 @@ func (m *Manager) mergeSubscriptions(subs []*model.Subscription) (map[string]int
 			data = map[string]interface{}{}
 		}
 
-		proxies = append(proxies, automation.PrefixProxyNames(sub.Name, data)...)
+		proxyRefs, groupRefs := automation.PrefixProxyNames(sub.Name, data)
+		proxies = append(proxies, proxyRefs...)
+
 		if group := popFirstProxyGroup(data); group != nil {
 			selectionGroups = append(selectionGroups, group)
+			groupRefs = rewritePoppedGroupRef(groupRefs)
 		}
+		proxies = append(proxies, groupRefs...)
+
 		combined = deepMerge(combined, data)
 	}
 
@@ -405,7 +410,7 @@ func dedupeMatchRule(rulesRaw interface{}) interface{} {
 		filtered = append(filtered, item)
 	}
 
-	return append(filtered, "MATCH,all proxies")
+	return append(filtered, "MATCH,Proxy Selection")
 }
 
 // dedupeGeoIPRule keeps only the last occurrence of each "GEOIP,<payload>"