Explicitly free memory from SSE events

src/timessquare/services/page.py

@@ -557,6 +557,11 @@ async def iterator() -> AsyncIterator[bytes]:
                     )
                     yield payload.to_sse().encode()
 
+                    # If we don't explicitly tell it to, the garbage collector
+                    # will not free the memory from these payloads, memory will
+                    # leak from any tab streaming events from this iterator.
+                    del payload
+
                     await asyncio.sleep(1)
             except asyncio.CancelledError:
                 self._logger.debug("HTML events disconnected from client")