feat: validate configuration

src/notifications/ntfy/config.rs

@@ -1,4 +1,5 @@
 use crate::app::Enableable;
+use crate::config::types::{Host, Password, Topic, Username};
 use serde::{Deserialize, Serialize};
 
 /// Configuration for the ntfy notification service
@@ -9,18 +10,18 @@ pub struct NtfyConfig {
     pub enable: bool,
 
     /// The host URL of the ntfy server
-    pub host: String,
+    pub host: Host,
 
     /// The username for authentication (optional)
     #[serde(default)]
-    pub username: Option<String>,
+    pub username: Option<Username>,
 
     /// The password for authentication (optional)
     #[serde(default)]
-    pub password: Option<String>,
+    pub password: Option<Password>,
 
     /// The topic to publish notifications to
-    pub topic: String,
+    pub topic: Topic,
 }
 
 impl Enableable for NtfyConfig {