fix(p2p): increase rate limit from 100 to 10000 msg/window

The previous limit of 100 messages per second was too low for active
validators running consensus, storage sync, and heartbeats. Bootstrap
validator was getting rate limited, blocking all P2P traffic.

Changes:
- DEFAULT_RATE_LIMIT: 100 -> 10000 (100x increase)
- RATE_LIMIT_WINDOW_MS: 1000 -> 10000 (1s -> 10s window)

This allows ~1000 messages/sec sustained throughput.

Author: echobt

crates/p2p-consensus/src/network.rs

@@ -695,10 +695,10 @@ impl Default for PeerMapping {
 }
 
 /// Default rate limit: maximum messages per second per signer
-const DEFAULT_RATE_LIMIT: u32 = 100;
+const DEFAULT_RATE_LIMIT: u32 = 10000;
 
 /// Rate limit sliding window in milliseconds (1 second)
-const RATE_LIMIT_WINDOW_MS: i64 = 1000;
+const RATE_LIMIT_WINDOW_MS: i64 = 10000;
 
 /// Nonce expiry time in milliseconds (5 minutes)
 const NONCE_EXPIRY_MS: i64 = 5 * 60 * 1000;