chore: get rid of static code warnings

internal/config/mail.go

@@ -17,14 +17,23 @@ const (
 )
 
 type MailConfig struct {
-	Host           string         `yaml:"host"`
-	Port           int            `yaml:"port"`
-	Encryption     MailEncryption `yaml:"encryption"`
-	CertValidation bool           `yaml:"cert_validation"`
-	Username       string         `yaml:"username"`
-	Password       string         `yaml:"password"`
-	AuthType       MailAuthType   `yaml:"auth_type"`
+	// Host is the hostname or IP of the SMTP server
+	Host string `yaml:"host"`
+	// Port is the port number for the SMTP server
+	Port int `yaml:"port"`
+	// Encryption is the SMTP encryption type
+	Encryption MailEncryption `yaml:"encryption"`
+	// CertValidation specifies whether the SMTP server certificate should be validated
+	CertValidation bool `yaml:"cert_validation"`
+	// Username is the optional SMTP username for authentication
+	Username string `yaml:"username"`
+	// Password is the optional SMTP password for authentication
+	Password string `yaml:"password"`
+	// AuthType is the SMTP authentication type
+	AuthType MailAuthType `yaml:"auth_type"`
 
-	From     string `yaml:"from"`
-	LinkOnly bool   `yaml:"link_only"`
+	// From is the default "From" address when sending emails
+	From string `yaml:"from"`
+	// LinkOnly specifies whether emails should only contain a link to WireGuard Portal or attach the full configuration
+	LinkOnly bool `yaml:"link_only"`
 }