fix: remove redundant binding tags and clarify logger compress logic

- Remove binding:"required" from model fields that are manually validated in handlers. - Add parentheses to logger compress default to clarify operator precedence.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

internal/logger/logger.go

@@ -47,7 +47,7 @@ func NewLogger(cfg config.LogConfig) (*zap.Logger, error) {
 		maxSize := applyDefaultInt(cfg.MaxSize, 100)
 		maxBackups := applyDefaultInt(cfg.MaxBackups, 5)
 		maxAge := applyDefaultInt(cfg.MaxAge, 30)
-		compress := cfg.Compress || cfg.MaxSize == 0 && cfg.MaxBackups == 0 && cfg.MaxAge == 0
+		compress := cfg.Compress || (cfg.MaxSize == 0 && cfg.MaxBackups == 0 && cfg.MaxAge == 0)
 
 		lj := &lumberjack.Logger{
 			Filename:   cfg.FilePath,