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/utils/uuid.ts

@@ -0,0 +1,36 @@
+/**
+ *  Explain UUID and link to RFC here.
+ *
+ *  @_subsection: api/utils:UUID  [about-uuid]
+ */
+import { getBytes, hexlify } from "./data.js";
+
+import type { BytesLike } from "./index.js";
+
+/**
+ *  Returns the version 4 [[link-uuid]] for the %%randomBytes%%.
+ *
+ *  @see: https://www.ietf.org/rfc/rfc4122.txt (Section 4.4)
+ */
+export function uuidV4(randomBytes: BytesLike): string {
+    const bytes = getBytes(randomBytes, "randomBytes");
+
+    // Section: 4.1.3:
+    // - time_hi_and_version[12:16] = 0b0100
+    bytes[6] = (bytes[6] & 0x0f) | 0x40;
+
+    // Section 4.4
+    // - clock_seq_hi_and_reserved[6] = 0b0
+    // - clock_seq_hi_and_reserved[7] = 0b1
+    bytes[8] = (bytes[8] & 0x3f) | 0x80;
+
+    const value = hexlify(bytes);
+
+    return [
+       value.substring(2, 10),
+       value.substring(10, 14),
+       value.substring(14, 18),
+       value.substring(18, 22),
+       value.substring(22, 34),
+    ].join("-");
+}