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

pkg/auth/casbin.go

@@ -4,7 +4,7 @@ import (
 	"fmt"
 	"sync"
 
-	"github.com/casbin/casbin/v2"
+	"github.com/casbin/casbin/v3"
 	gormadapter "github.com/casbin/gorm-adapter/v3"
 	"go.uber.org/zap"
 	"gorm.io/gorm"