Fix an outdated docstring on identity and try_identity in the Rust SDK

Since we changed from `with_credentials` to `with_token`,
the Rust client SDK no longer knows its `Identity` prior to `on_connect`,
even when the connection is not anonymous.

Author: gefjon

crates/sdk/src/db_context.rs

@@ -51,17 +51,15 @@ pub trait DbContext {
 
     /// Get the [`Identity`] of this connection.
     ///
-    /// This method panics if the connection was constructed anonymously
-    /// and we have not yet received our newly-generated [`Identity`] from the host.
+    /// This method panics if we have not yet received our [`Identity`] from the host.
     /// For a non-panicking version, see [`Self::try_identity`].
     fn identity(&self) -> Identity {
         self.try_identity().unwrap()
     }
 
     /// Get the [`Identity`] of this connection.
     ///
-    /// This method returns `None` if the connection was constructed anonymously
-    /// and we have not yet received our newly-generated [`Identity`] from the host.
+    /// This method returns `None` if we have not yet received our [`Identity`] from the host.
     /// For a panicking version, see [`Self::identity`].
     fn try_identity(&self) -> Option<Identity>;