feat(kafka): add payment_intent payment_attempt and refund kafka events for v2 (#8328)

Co-authored-by: Kashif <kashif.dev@protonmail.com>

crates/masking/src/secret.rs

@@ -85,6 +85,14 @@ where
     {
         StrongSecret::new(self.inner_secret)
     }
+
+    /// Convert to [`Secret`] with a reference to the inner secret
+    pub fn as_ref(&self) -> Secret<&SecretValue, MaskingStrategy>
+    where
+        MaskingStrategy: for<'a> Strategy<&'a SecretValue>,
+    {
+        Secret::new(self.peek())
+    }
 }
 
 impl<SecretValue, MaskingStrategy> PeekInterface<SecretValue>

crates/masking/src/serde.rs

@@ -31,6 +31,8 @@ impl SerializableSecret for url::Url {}
 #[cfg(feature = "time")]
 impl SerializableSecret for time::Date {}
 
+impl<T: SerializableSecret> SerializableSecret for &T {}
+
 impl<'de, T, I> Deserialize<'de> for Secret<T, I>
 where
     T: Clone + de::DeserializeOwned + Sized,