sdk: deprecate Options::notification_channel_size

From 90c4115 is possible to set the `RelayPoolOptions`, so this is no longer needed.

Signed-off-by: Yuki Kishimoto <[email protected]>

Author: yukibtc

CHANGELOG.md

@@ -40,6 +40,10 @@
 * mls: add new crate for implementing MLS messaging ([JeffG] at https://github.com/rust-nostr/nostr/pull/843)
 * sdk: add `Options::pool` ([Yuki Kishimoto])
 
+### Deprecated
+
+* sdk: deprecate `Options::notification_channel_size` ([Yuki Kishimoto])
+
 ## v0.41.0 - 2025/04/15
 
 ### Breaking changes

crates/nostr-sdk/src/client/options.rs

@@ -96,7 +96,7 @@ impl Options {
     }
 
     /// Notification channel size (default: [`DEFAULT_NOTIFICATION_CHANNEL_SIZE`])
-    #[inline]
+    #[deprecated(since = "0.42.0", note = "Use `Options::pool` instead.")]
     pub fn notification_channel_size(mut self, size: usize) -> Self {
         self.pool = self.pool.notification_channel_size(size);
         self