fix: harden rule and forwarding edge cases

internal/ingest/alert_forward.go

@@ -72,7 +72,12 @@ func postAlertPayload(cfg *config.AlertForwardConf, path string, payload []byte)
 	if cfg.InternalKey != "" {
 		req.Header.Set("X-Internal-Key", cfg.InternalKey)
 	}
-	client := &http.Client{Timeout: 10 * time.Second}
+	client := &http.Client{
+		Timeout: 10 * time.Second,
+		CheckRedirect: func(_ *http.Request, _ []*http.Request) error {
+			return http.ErrUseLastResponse
+		},
+	}
 	resp, err := client.Do(req)
 	if err != nil {
 		return fmt.Errorf("发送 Alert 转发请求失败：%w", err)

internal/ingest/engine.go

@@ -665,7 +665,7 @@ func trapRuleMatches(rule *models.TrapRule, trapOID, varbindFP string) bool {
 	if hasOID && !strings.HasPrefix(normOID(trapOID), normOID(rule.OIDPrefix)) {
 		return false
 	}
-	if rule.VarbindMatchRegex != "" {
+	if hasRE {
 		re, err := regexp.Compile(rule.VarbindMatchRegex)
 		if err != nil {
 			return false