Implement bad connections baseline reset functionality

- Added a new field `badConnBaseline` in the `Handler` struct to store the baseline for bad connections.
- Updated the `BuildIncidents` function to utilize the effective bad connections count for incident generation.
- Introduced a new API endpoint `/api/agg/bad-connections/reset` to reset the bad connections baseline.
- Enhanced the frontend with a button to trigger the reset action, providing user feedback through toast notifications.
- Updated Svelte components to handle the reset functionality and display appropriate messages based on the operation's success or failure.

internal/aggregate/incidents.go

@@ -65,7 +65,8 @@ func BuildIncidents(ctx context.Context, h *Handler, aliases []string) (Incident
 			partial = true
 			continue
 		}
-		if data.ConnectionsBadTotal >= 10000 {
+		badEff := h.effectiveConnectionsBad(alias, data.ConnectionsBadTotal)
+		if badEff >= 10000 {
 			out.Items = append(out.Items, IncidentItem{
 				ID:              fmt.Sprintf("bad_connections_high:%s", alias),
 				Kind:            "bad_connections_high",
@@ -75,13 +76,13 @@ func BuildIncidents(ctx context.Context, h *Handler, aliases []string) (Incident
 				Summary:         "Резкий рост ошибок клиентских соединений",
 				AffectedAliases: []string{alias},
 				MetricName:      "connections_bad_total",
-				MetricValue:     float64(data.ConnectionsBadTotal),
+				MetricValue:     float64(badEff),
 				MetricThreshold: 10000,
 				Actions: []IncidentAction{
 					{Label: "Node dashboard", Href: "/servers/" + alias},
 				},
 			})
-		} else if data.ConnectionsBadTotal >= 1000 {
+		} else if badEff >= 1000 {
 			out.Items = append(out.Items, IncidentItem{
 				ID:              fmt.Sprintf("bad_connections_warn:%s", alias),
 				Kind:            "bad_connections_warn",
@@ -91,7 +92,7 @@ func BuildIncidents(ctx context.Context, h *Handler, aliases []string) (Incident
 				Summary:         "Наблюдается рост ошибок клиентских соединений",
 				AffectedAliases: []string{alias},
 				MetricName:      "connections_bad_total",
-				MetricValue:     float64(data.ConnectionsBadTotal),
+				MetricValue:     float64(badEff),
 				MetricThreshold: 1000,
 				Actions: []IncidentAction{
 					{Label: "Node dashboard", Href: "/servers/" + alias},