Update schemas and resolve some warnings

src/web/routes/dashboard/mod.rs

@@ -593,18 +593,11 @@ pub(crate) async fn create_reminder(
 }
 
 fn check_channel_matches_guild(ctx: &Context, channel_id: ChannelId, guild_id: GuildId) -> bool {
-    // validate channel
-    let channel = channel_id.to_channel_cached(&ctx.cache);
-    let channel_exists = channel.is_some();
+    return match ctx.cache.guild(guild_id) {
+        Some(guild) => guild.channels.get(&channel_id).is_some(),
 
-    if !channel_exists {
-        return false;
-    }
-
-    let channel_matches_guild =
-        channel.map_or(false, |c| c.guild(&ctx.cache).map_or(false, |g| g.id == guild_id));
-
-    channel_matches_guild
+        None => false,
+    };
 }
 
 async fn create_database_channel(