fix: improve key derivation and logging

- Fix mnemonic validation in Python version
- Add consistent output logging across Python/TypeScript
- Show key derivation details in readable format
- Truncate sensitive values in output
- Match output format between implementations

This fixes the mnemonic error and improves debugging by
adding consistent logging of the key derivation process.

test-scripts/new_flow.py

@@ -94,6 +94,10 @@ def derive_address(
     public_key = pk.public_key
     public_hex = public_key.to_hex()[2:]  # Remove '0x' prefix
 
+    print(f"  Address: {address}")
+    print(f"  Private Key: {private_hex[:8]}...")
+    print(f"  Public Key: {public_hex[:8]}...")
+
     return address, private_hex, public_hex, derivation_path
 
 def new_identifier(

test-scripts/new_flow.ts

@@ -42,18 +42,26 @@ function generateMnemonic(): string {
 /**
  * Derive Ethereum address and keys from a mnemonic phrase
  */
-function deriveAddress(
+async function deriveAddress(
     mnemonic: string,
     derivationPath: string = DEFAULT_ROOT_DERIVATION_PATH
-): [string, string, string, string] {
+): Promise<[string, string, string, string]> {
     mnemonic = mnemonic.trim().toLowerCase();
     const hdnode: HDNode = HDNode.fromMnemonic(mnemonic);
     const rootNode: HDNode = hdnode.derivePath(derivationPath);
     
+    console.log("\nKey Derivation:");
+    console.log(`  Mnemonic (first 4 words): ${mnemonic.split(' ').slice(0,4).join(' ')}...`);
+    console.log(`  Derivation Path: ${derivationPath}`);
+    
     const privateHex = rootNode.privateKey.substring(2); // remove '0x'
     const publicHex = rootNode.publicKey.substring(2); // remove '0x'
     const address = rootNode.address;
 
+    console.log(`  Address: ${address}`);
+    console.log(`  Private Key: ${privateHex.substring(0,8)}...`);
+    console.log(`  Public Key: ${publicHex.substring(0,8)}...`);
+
     return [address, privateHex, publicHex, derivationPath];
 }
 
@@ -89,7 +97,7 @@ function newIdentifier(
  */
 async function initializeAccount(): Promise<IIdentifier> {
     const mnemonic = generateMnemonic();
-    const [address, privateHex, publicHex, derivationPath] = deriveAddress(mnemonic);
+    const [address, privateHex, publicHex, derivationPath] = await deriveAddress(mnemonic);
     const identity = newIdentifier(address, publicHex, privateHex, derivationPath);
 
     // Format and display account data