docs(streaming): document redactedContent event type (#90)

Author: awsarron

docs/user-guide/concepts/streaming/async-iterators.md

@@ -61,6 +61,7 @@ The async iterator yields the same event types as [callback handlers](callback-h
 - `reasoning`: True for reasoning events
 - `reasoningText`: Text from reasoning process
 - `reasoning_signature`: Signature from reasoning process
+- `redactedContent`: Reasoning content redacted by the model
 
 ## FastAPI Example
 

docs/user-guide/concepts/streaming/callback-handlers.md

@@ -67,6 +67,7 @@ Callback handlers receive the same event types as [async iterators](./async-iter
 - `reasoning`: True for reasoning events
 - `reasoningText`: Text from reasoning process
 - `reasoning_signature`: Signature from reasoning process
+- `redactedContent`: Reasoning content redacted by the model
 
 ## Default Callback Handler