converge: disable response timeout on relay SSE connection

tlsManagerSettings defaults to a 30s response timeout, which kills
long-lived SSE connections between push events. Set it to
responseTimeoutNone so the relay watcher waits indefinitely.

src/Converge.hs

@@ -585,7 +585,7 @@ connectRelay :: Text -> Logger -> [RepoConfig] -> IO ()
 connectRelay url logger repos = do
     logMsg logger Info ("relay: connecting to " <> url)
     req <- parseRequest (T.unpack url)
-    manager <- newManager tlsManagerSettings
+    manager <- newManager tlsManagerSettings{managerResponseTimeout = responseTimeoutNone}
     let loop delay = do
             let delaySec = min delay (60 :: Int)
             result <- try $