Increase activation delay + queue size

It was found during testing that a bit longer delay works better

nano/lib/config.hpp

@@ -304,7 +304,7 @@ class network_constants
 	std::chrono::milliseconds telemetry_cache_cutoff{ 1000 * 130 }; // 2 * `telemetry_broadcast_interval` + some margin
 
 	/** How much to delay activation of optimistic elections to avoid interfering with election scheduler */
-	std::chrono::seconds optimistic_activation_delay{ 5 };
+	std::chrono::seconds optimistic_activation_delay{ 30 };
 
 	/** Returns the network this object contains values for */
 	nano::networks network () const

nano/node/optimistic_scheduler.hpp

@@ -39,7 +39,7 @@ class optimistic_scheduler_config final
 	std::size_t gap_threshold{ 32 };
 
 	/** Maximum number of candidates stored in memory */
-	std::size_t max_size{ 1024 * 16 };
+	std::size_t max_size{ 1024 * 64 };
 };
 
 class optimistic_scheduler final