fixed inet typos

src/db.rs

@@ -134,7 +134,7 @@ impl Database {
     }
 
     pub async fn upsert_open_endpoint(&self, ip: std::net::Ipv4Addr, port: u16) -> Result<()> {
-        let ip = ip.to_string();
+        let ip = std::net::IpAddr::V4(ip);
         let port = i32::from(port);
 
         self.client
@@ -148,7 +148,7 @@ impl Database {
                     created_at,
                     updated_at
                 )
-                VALUES ($1::inet, $2, NOW(), NOW(), NOW(), NOW())
+                VALUES ($1, $2, NOW(), NOW(), NOW(), NOW())
                 ON CONFLICT (ip) DO UPDATE SET
                     port = EXCLUDED.port,
                     scanned_at = NOW(),