feat(storage): add use_hashed_state storage setting (#21997)

crates/node/core/src/args/storage.rs

@@ -23,6 +23,16 @@ pub struct StorageArgs {
     /// flags.
     #[arg(long = "storage.v2", action = ArgAction::SetTrue)]
     pub v2: bool,
+
+    /// Use hashed state tables (`HashedAccounts`/`HashedStorages`) as canonical state
+    /// representation instead of plain state tables.
+    ///
+    /// When enabled, execution writes directly to hashed tables, eliminating the need for
+    /// separate hashing stages. This should only be enabled for new databases.
+    ///
+    /// WARNING: Changing this setting on an existing database requires a full resync.
+    #[arg(long = "storage.use-hashed-state", default_value_t = false)]
+    pub use_hashed_state: bool,
 }
 
 #[cfg(test)]

crates/node/core/src/node_config.rs

@@ -408,6 +408,8 @@ impl<ChainSpec> NodeConfig<ChainSpec> {
             s = s.with_account_history_in_rocksdb(v);
         }
 
+        s = s.with_use_hashed_state(self.storage.use_hashed_state);
+
         s
     }