feat: Pump.fun mayhem_mode, Solana 3.1.12, TradeConfig builder alignment

- PumpFunParams::from_trade/from_dev_trade: add mayhem_mode Option; infer Mayhem
  via is_mayhem_fee_recipient when None (fixes fee recipient / NotAuthorized 6000
  when AMM protocol fee pubkey is used).
- Add is_mayhem_fee_recipient and is_amm_fee_recipient helpers in pumpfun utils.
- Bump solana-* crates to 3.1.12; align tonic/prost; use solana-message for
  AddressLookupTableAccount; add solana-system-interface 3.0.
- Update examples and latency script for new PumpFunParams signature.
- SWQoS and transaction builder adjustments for dependency changes.

Made-with: Cursor

src/common/nonce_cache.rs

@@ -1,8 +1,5 @@
 use crate::common::SolanaRpcClient;
 use solana_hash::Hash;
-use solana_nonce::state::State;
-use solana_nonce::versions::Versions;
-use solana_sdk::account_utils::StateMut;
 use solana_sdk::pubkey::Pubkey;
 use tracing::error;
 
@@ -21,18 +18,21 @@ pub async fn fetch_nonce_info(
     nonce_account: Pubkey,
 ) -> Option<DurableNonceInfo> {
     match rpc.get_account(&nonce_account).await {
-        Ok(account) => match account.state() {
-            Ok(Versions::Current(state)) => {
-                if let State::Initialized(data) = *state {
-                    let blockhash = data.durable_nonce.as_hash();
-                    return Some(DurableNonceInfo {
-                        nonce_account: Some(nonce_account),
-                        current_nonce: Some(*blockhash),
-                    });
-                }
+        Ok(account) => {
+            // Parse nonce account manually: first 4 bytes is version, then 4 bytes authority type
+            // For initialized nonce: version=0, authority_type=0, then authority (32 bytes), then blockhash (32 bytes), then fee_calculator
+            if account.data.len() >= 80 {
+                // Skip version (4) + authority_type (4) + authority (32) = 40 bytes
+                // Then blockhash is at offset 40
+                let blockhash_bytes: [u8; 32] = account.data[40..72].try_into().ok()?;
+                return Some(DurableNonceInfo {
+                    nonce_account: Some(nonce_account),
+                    current_nonce: Some(Hash::from(blockhash_bytes)),
+                });
+            } else {
+                error!("Nonce account data too short");
             }
-            _ => (),
-        },
+        }
         Err(e) => {
             error!("Failed to get nonce account information: {:?}", e);
         }