docs: fix misleading JSDoc comments in streamableHttp

- Fix _scheduleReconnection comment: delay can now come from server retry
  field, not just exponential backoff
- Fix getStreamIdForEventId comment: SDK doesn't parse streamId::... format,
  it uses replayEventsAfter return value as fallback

Author: felixweinberger

src/client/streamableHttp.ts

@@ -266,7 +266,7 @@ export class StreamableHTTPClientTransport implements Transport {
     }
 
     /**
-     * Schedule a reconnection attempt with exponential backoff
+     * Schedule a reconnection attempt using server-provided retry interval or backoff
      *
      * @param lastEventId The ID of the last received event for resumability
      * @param attemptCount Current reconnection attempt count for this specific stream

src/server/streamableHttp.ts

@@ -40,9 +40,8 @@ export interface EventStore {
      * @param eventId The event ID to look up
      * @returns The stream ID, or undefined if not found
      *
-     * Optional: If not provided, the SDK will attempt to parse the streamId
-     * from the eventId assuming format "streamId::...". Implementations should
-     * provide this method for more reliable stream ID resolution.
+     * Optional: If not provided, the SDK will use the streamId returned by
+     * replayEventsAfter for stream mapping.
      */
     getStreamIdForEventId?(eventId: EventId): Promise<StreamId | undefined>;