fix(config): increase Redis max_pool_size to 50

Pool size of 10 was causing connection exhaustion and timeouts
when waypoint runs concurrent shard subscribers.

Author: christopherwxyz

config/examples/config.default.toml

@@ -11,7 +11,7 @@ store_messages = true
 # Redis Configuration
 [redis]
 url = "redis://localhost:6379"
-max_pool_size = 10
+max_pool_size = 50
 
 # Farcaster Hub Configuration
 [hub]