Thought it best to add some comments

internal/models/note.go

@@ -4,8 +4,12 @@ import (
 	"time"
 )
 
+// Note represents a single note with its metadata.
 type Note struct {
-	ID         int       `json:"id"`
+	// ID is the unique identifier of the note.
+	ID int `json:"id"`
+	// LastUpdate is the timestamp of when the note was last modified.
 	LastUpdate time.Time `json:"last_update"`
-	Content    string    `json:"content"`
+	// Content is the actual text content of the note.
+	Content string `json:"content"`
 }