refactor: move brother_node development artifact to dev/test-nodes subdirectory

Development Artifact Cleanup:
✅ BROTHER_NODE REORGANIZATION: Moved development test node to appropriate location
- dev/test-nodes/brother_node/: Moved from root directory for better organization
- Contains development configuration, test logs, and test chain data
- No impact on production systems - purely development/testing artifact

✅ DEVELOPMENT ARTIFACTS IDENTIFIED:
- Chain ID: aitbc-brother-chain (test/development chain)
- Ports: 8010 (P2P) and 8011 (RPC) - different from production
- Environment: .env file with test configuration
- Logs: rpc.log and node.log from development testing session (March 15, 2026)

✅ ROOT DIRECTORY CLEANUP: Removed development clutter from production directory
- brother_node/ moved to dev/test-nodes/brother_node/
- Root directory now contains only production-ready components
- Development artifacts properly organized in dev/ subdirectory

DIRECTORY STRUCTURE IMPROVEMENT:
📁 dev/test-nodes/: Development and testing node configurations
🏗️ Root Directory: Clean production structure with only essential components
🧪 Development Isolation: Test environments separated from production

BENEFITS:
✅ Clean Production Directory: No development artifacts in root
✅ Better Organization: Development nodes grouped in dev/ subdirectory
✅ Clear Separation: Production vs development environments clearly distinguished
✅ Maintainability: Easier to identify and manage development components

RESULT: Successfully moved brother_node development artifact to dev/test-nodes/ subdirectory, cleaning up the root directory while preserving development testing environment for future use.

dev/env/node_modules/ethers/src.ts/crypto/scrypt.ts

@@ -0,0 +1,114 @@
+import { scrypt as _nobleSync, scryptAsync as _nobleAsync } from "@noble/hashes/scrypt";
+
+import { getBytes, hexlify as H } from "../utils/index.js";
+
+import type { BytesLike } from "../utils/index.js";
+
+/**
+ *  A callback during long-running operations to update any
+ *  UI or provide programatic access to the progress.
+ *
+ *  The %%percent%% is a value between ``0`` and ``1``.
+ *
+ *  @_docloc: api/crypto:Passwords
+ */
+export type ProgressCallback = (percent: number) => void;
+
+
+let lockedSync = false, lockedAsync = false;
+
+const _scryptAsync = async function(passwd: Uint8Array, salt: Uint8Array, N: number, r: number, p: number, dkLen: number, onProgress?: ProgressCallback) {
+    return await _nobleAsync(passwd, salt, { N, r, p, dkLen, onProgress });
+}
+const _scryptSync = function(passwd: Uint8Array, salt: Uint8Array, N: number, r: number, p: number, dkLen: number) {
+    return _nobleSync(passwd, salt, { N, r, p, dkLen });
+}
+
+let __scryptAsync: (passwd: Uint8Array, salt: Uint8Array, N: number, r: number, p: number, dkLen: number, onProgress?: ProgressCallback) => Promise<BytesLike> = _scryptAsync;
+let __scryptSync: (passwd: Uint8Array, salt: Uint8Array, N: number, r: number, p: number, dkLen: number) => BytesLike = _scryptSync
+
+
+/**
+ *  The [[link-wiki-scrypt]] uses a memory and cpu hard method of
+ *  derivation to increase the resource cost to brute-force a password
+ *  for a given key.
+ *
+ *  This means this algorithm is intentionally slow, and can be tuned to
+ *  become slower. As computation and memory speed improve over time,
+ *  increasing the difficulty maintains the cost of an attacker.
+ *
+ *  For example, if a target time of 5 seconds is used, a legitimate user
+ *  which knows their password requires only 5 seconds to unlock their
+ *  account. A 6 character password has 68 billion possibilities, which
+ *  would require an attacker to invest over 10,000 years of CPU time. This
+ *  is of course a crude example (as password generally aren't random),
+ *  but demonstrates to value of imposing large costs to decryption.
+ *
+ *  For this reason, if building a UI which involved decrypting or
+ *  encrypting datsa using scrypt, it is recommended to use a
+ *  [[ProgressCallback]] (as event short periods can seem lik an eternity
+ *  if the UI freezes). Including the phrase //"decrypting"// in the UI
+ *  can also help, assuring the user their waiting is for a good reason.
+ *
+ *  @_docloc: api/crypto:Passwords
+ *
+ *  @example:
+ *    // The password must be converted to bytes, and it is generally
+ *    // best practices to ensure the string has been normalized. Many
+ *    // formats explicitly indicate the normalization form to use.
+ *    password = "hello"
+ *    passwordBytes = toUtf8Bytes(password, "NFKC")
+ *
+ *    salt = id("some-salt")
+ *
+ *    // Compute the scrypt
+ *    scrypt(passwordBytes, salt, 1024, 8, 1, 16)
+ *    //_result:
+ */
+export async function scrypt(_passwd: BytesLike, _salt: BytesLike, N: number, r: number, p: number, dkLen: number, progress?: ProgressCallback): Promise<string> {
+    const passwd = getBytes(_passwd, "passwd");
+    const salt = getBytes(_salt, "salt");
+    return H(await __scryptAsync(passwd, salt, N, r, p, dkLen, progress));
+}
+scrypt._ = _scryptAsync;
+scrypt.lock = function(): void { lockedAsync = true; }
+scrypt.register = function(func: (passwd: Uint8Array, salt: Uint8Array, N: number, r: number, p: number, dkLen: number, progress?: ProgressCallback) => Promise<BytesLike>) {
+    if (lockedAsync) { throw new Error("scrypt is locked"); }
+    __scryptAsync = func;
+}
+Object.freeze(scrypt);
+
+/**
+ *  Provides a synchronous variant of [[scrypt]].
+ *
+ *  This will completely lock up and freeze the UI in a browser and will
+ *  prevent any event loop from progressing. For this reason, it is
+ *  preferred to use the [async variant](scrypt).
+ *
+ *  @_docloc: api/crypto:Passwords
+ *
+ *  @example:
+ *    // The password must be converted to bytes, and it is generally
+ *    // best practices to ensure the string has been normalized. Many
+ *    // formats explicitly indicate the normalization form to use.
+ *    password = "hello"
+ *    passwordBytes = toUtf8Bytes(password, "NFKC")
+ *
+ *    salt = id("some-salt")
+ *
+ *    // Compute the scrypt
+ *    scryptSync(passwordBytes, salt, 1024, 8, 1, 16)
+ *    //_result:
+ */
+export function scryptSync(_passwd: BytesLike, _salt: BytesLike, N: number, r: number, p: number, dkLen: number): string {
+    const passwd = getBytes(_passwd, "passwd");
+    const salt = getBytes(_salt, "salt");
+    return H(__scryptSync(passwd, salt, N, r, p, dkLen));
+}
+scryptSync._ = _scryptSync;
+scryptSync.lock = function(): void { lockedSync = true; }
+scryptSync.register = function(func: (passwd: Uint8Array, salt: Uint8Array, N: number, r: number, p: number, dkLen: number) => BytesLike) {
+    if (lockedSync) { throw new Error("scryptSync is locked"); }
+    __scryptSync = func;
+}
+Object.freeze(scryptSync);