feat: add noter secret setup script

noter/setup-secret.js

@@ -0,0 +1,44 @@
+#!/usr/bin/env node
+/**
+ * Extract noter mnemonic from validator wallet file and write to Docker secrets location.
+ * Usage: node setup-secret.js /path/to/MAINNET_WALLETS.json [ValidatorNumber]
+ *
+ * Default: Validator_01_Stash (first validator with Noter tiki)
+ */
+
+import fs from 'fs';
+import path from 'path';
+
+const walletFile = process.argv[2] || '/home/mamostehp/res/MAINNET_WALLETS_20260128_235407.json';
+const validatorNum = process.argv[3] || '01';
+const targetName = `Validator_${validatorNum.padStart(2, '0')}_Stash`;
+
+const secretDir = path.join(path.dirname(new URL(import.meta.url).pathname), '..', 'secrets');
+const secretFile = path.join(secretDir, 'noter_mnemonic.txt');
+
+try {
+  const data = JSON.parse(fs.readFileSync(walletFile, 'utf8'));
+  const wallet = data.wallets.find(w => w.name === targetName);
+
+  if (!wallet || !wallet.seed_phrase) {
+    console.error(`ERROR: ${targetName} not found in ${walletFile}`);
+    process.exit(1);
+  }
+
+  // Create secrets directory if it doesn't exist
+  if (!fs.existsSync(secretDir)) {
+    fs.mkdirSync(secretDir, { mode: 0o700 });
+  }
+
+  // Write mnemonic
+  fs.writeFileSync(secretFile, wallet.seed_phrase + '\n', { mode: 0o600 });
+
+  console.log(`Noter secret written successfully.`);
+  console.log(`  Account: ${targetName}`);
+  console.log(`  Address: ${wallet.ss58_address}`);
+  console.log(`  File: ${secretFile}`);
+  console.log(`  Permissions: 0600`);
+} catch (err) {
+  console.error('ERROR:', err.message);
+  process.exit(1);
+}