Tentative embed caching fix

src/commands/challenge.rs

@@ -204,6 +204,7 @@ pub async fn submit(ctx: Context<'_>, submission: serenity::Attachment) -> Resul
             Some(data["invite"].as_str().unwrap())
         } else {
             None };
+        let timestamp = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap().as_millis();
         for image in submitted_images.iter() {
             for (other_guild_id, data) in guild_data.iter() {
                 let here = other_guild_id.eq(&ctx.guild_id().unwrap().as_u64().to_string());
@@ -247,7 +248,7 @@ pub async fn submit(ctx: Context<'_>, submission: serenity::Attachment) -> Resul
                             .name(username)
                             .url(format!("https://discord.com/users/{}", author.id));
                         e.set_author(embed_author);
-                        e.image(format!("https://tegakituesday.com/{n}/{image}"));
+                        e.image(format!("https://tegakituesday.com/{n}/{image}#{timestamp}"));
                         if let Some(accent_color) = accent_color {
                             e.color(accent_color);
                         }