feat(auth): upgrade casbin to v3 and enhance connection pool configurations

- Upgrade casbin from v2 to v3 across go.mod and pkg/auth/casbin.go
- Add slide captcha verification to registration flow (CheckVerified, ConsumeVerified)
- Add DB wrapper with connection pool statistics and health checks
- Add Redis connection pool optimizations with stats and health monitoring
- Add new config options: ConnMaxLifetime, HealthCheckInterval, EnableRetryOnError
- Optimize slow query threshold from 200ms to 100ms
- Add ping with retry mechanism for database and Redis connections

internal/types/common.go

@@ -41,6 +41,7 @@ type RegisterRequest struct {
 	Email            string `json:"email" binding:"required,email" example:"user@example.com"`
 	Password         string `json:"password" binding:"required,min=6,max=128" example:"password123"`
 	VerificationCode string `json:"verification_code" binding:"required,len=6" example:"123456"`                                   // 邮箱验证码
+	CaptchaID        string `json:"captcha_id" binding:"required" example:"uuid-xxxx-xxxx"`                                        // 滑动验证码ID
 	Avatar           string `json:"avatar" binding:"omitempty,url" example:"https://rustfs.example.com/avatars/user_1/avatar.png"` // 可选，用户自定义头像
 }