add federation client for select high-timeout requests

Signed-off-by: Jason Volk <jason@zemos.net>

src/core/config/mod.rs

@@ -1775,7 +1775,7 @@ fn default_well_known_conn_timeout() -> u64 { 6 }
 
 fn default_well_known_timeout() -> u64 { 10 }
 
-fn default_federation_timeout() -> u64 { 300 }
+fn default_federation_timeout() -> u64 { 25 }
 
 fn default_federation_idle_timeout() -> u64 { 25 }