feat: improve datasource query audit workflows

backend/internal/handler/instance.go

@@ -14,10 +14,10 @@ import (
 // GET /api/v1/instances
 func ListInstances(c *gin.Context) {
 	userID, _, role := middleware.GetCurrentUser(c)
-	
+
 	var instances []model.Instance
 	query := model.DB.Order("id")
-	
+
 	// developer only sees instances in their groups
 	if role == "developer" {
 		var groupIDs []int
@@ -33,12 +33,12 @@ func ListInstances(c *gin.Context) {
 			}
 		}
 	}
-	
+
 	if err := query.Find(&instances).Error; err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"detail": err.Error()})
 		return
 	}
-	
+
 	// mask passwords in response
 	for i := range instances {
 		instances[i].Password = ""
@@ -86,8 +86,8 @@ func CreateInstance(c *gin.Context) {
 			if result.Version != "" {
 				updates["version"] = result.Version
 			}
-			if result.ClusterMode {
-				updates["cluster_mode"] = true
+			if instance.DBType == "redis" {
+				updates["cluster_mode"] = result.ClusterMode
 			}
 		} else {
 			updates["status"] = "error"
@@ -108,13 +108,13 @@ func UpdateInstance(c *gin.Context) {
 		c.JSON(http.StatusNotFound, gin.H{"detail": "Instance not found"})
 		return
 	}
-	
+
 	var input map[string]interface{}
 	if err := c.ShouldBindJSON(&input); err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"detail": err.Error()})
 		return
 	}
-	
+
 	// if password is empty or masked placeholder, don't update it
 	if pw, ok := input["password"].(string); ok {
 		pw = strings.TrimSpace(pw)
@@ -128,12 +128,12 @@ func UpdateInstance(c *gin.Context) {
 			}
 		}
 	}
-	
+
 	if err := model.DB.Model(&instance).Updates(input).Error; err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"detail": err.Error()})
 		return
 	}
-	
+
 	model.DB.First(&instance, id)
 	instance.Password = "******"
 	c.JSON(http.StatusOK, instance)
@@ -157,15 +157,15 @@ func TestConnection(c *gin.Context) {
 		c.JSON(http.StatusNotFound, gin.H{"detail": "Instance not found"})
 		return
 	}
-	
+
 	result := testDBConnectionFull(&instance)
 	// Update version & cluster_mode in DB if detected
 	updates := map[string]interface{}{}
 	if result.Success && result.Version != "" {
 		updates["version"] = result.Version
 	}
-	if result.ClusterMode {
-		updates["cluster_mode"] = true
+	if instance.DBType == "redis" {
+		updates["cluster_mode"] = result.ClusterMode
 	}
 	if len(updates) > 0 {
 		model.DB.Model(&model.Instance{}).Where("id = ?", instance.ID).Updates(updates)
@@ -181,16 +181,16 @@ func TestConnection(c *gin.Context) {
 func InstanceStats(c *gin.Context) {
 	var total int64
 	model.DB.Model(&model.Instance{}).Count(&total)
-	
+
 	type typeCount struct {
 		DBType string `json:"db_type"`
 		Count  int64  `json:"count"`
 	}
 	var byType []typeCount
 	model.DB.Model(&model.Instance{}).Select("db_type, count(*) as count").Group("db_type").Scan(&byType)
-	
+
 	c.JSON(http.StatusOK, gin.H{
-		"total":  total,
+		"total":   total,
 		"by_type": byType,
 	})
 }