feat(logging): added in db and logging with websocket

backend/utils/db/logs.go

@@ -0,0 +1,41 @@
+package db
+
+import "time"
+
+type Log struct {
+	ID        uint      `gorm:"primaryKey"`
+	Level     string    `gorm:"size:10;not null"` // "info", "error", etc.
+	Message   string    `gorm:"not null"`
+	Service   string    `gorm:"size:50"`    // Optional: service name
+	Metadata  JSONB     `gorm:"type:jsonb"` // Structured fields (e.g., {"user_id": 123})
+	CreatedAt time.Time `gorm:"index"`      // Auto-set by GORM
+	Checked   bool      `gorm:"type:boolean;default:false"`
+}
+
+// JSONB is a helper type for PostgreSQL JSONB fields.
+type JSONB map[string]interface{}
+
+// --- CRUD Operations ---
+
+// CreateLog inserts a new log entry.
+func CreateLog(level, message, service string, metadata JSONB) error {
+	log := Log{
+		Level:    level,
+		Message:  message,
+		Service:  service,
+		Metadata: metadata,
+	}
+	return DB.Create(&log).Error
+}
+
+// GetLogsByLevel fetches logs filtered by severity.
+func GetLogsByLevel(level string, limit int) ([]Log, error) {
+	var logs []Log
+	err := DB.Where("level = ?", level).Limit(limit).Find(&logs).Error
+	return logs, err
+}
+
+// DeleteOldLogs removes logs older than `days`.
+func DeleteOldLogs(days int) error {
+	return DB.Where("created_at < ?", time.Now().AddDate(0, 0, -days)).Delete(&Log{}).Error
+}