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/aes-js/lib.commonjs/mode-cfb.js

@@ -0,0 +1,81 @@
+"use strict";
+// Cipher Feedback
+var __classPrivateFieldSet = (this && this.__classPrivateFieldSet) || function (receiver, state, value, kind, f) {
+    if (kind === "m") throw new TypeError("Private method is not writable");
+    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter");
+    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot write private member to an object whose class did not declare it");
+    return (kind === "a" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;
+};
+var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
+    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
+    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
+    return kind === "m" ? f : kind === "a" ? f.call(receiver) : f ? f.value : state.get(receiver);
+};
+var _CFB_instances, _CFB_iv, _CFB_shiftRegister, _CFB_shift;
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.CFB = void 0;
+const mode_js_1 = require("./mode.js");
+class CFB extends mode_js_1.ModeOfOperation {
+    constructor(key, iv, segmentSize = 8) {
+        super("CFB", key, CFB);
+        _CFB_instances.add(this);
+        _CFB_iv.set(this, void 0);
+        _CFB_shiftRegister.set(this, void 0);
+        // This library currently only handles byte-aligned segmentSize
+        if (!Number.isInteger(segmentSize) || (segmentSize % 8)) {
+            throw new TypeError("invalid segmentSize");
+        }
+        Object.defineProperties(this, {
+            segmentSize: { enumerable: true, value: segmentSize }
+        });
+        if (iv) {
+            if (iv.length % 16) {
+                throw new TypeError("invalid iv size (must be 16 bytes)");
+            }
+            __classPrivateFieldSet(this, _CFB_iv, new Uint8Array(iv), "f");
+        }
+        else {
+            __classPrivateFieldSet(this, _CFB_iv, new Uint8Array(16), "f");
+        }
+        __classPrivateFieldSet(this, _CFB_shiftRegister, this.iv, "f");
+    }
+    get iv() { return new Uint8Array(__classPrivateFieldGet(this, _CFB_iv, "f")); }
+    encrypt(plaintext) {
+        if (8 * plaintext.length % this.segmentSize) {
+            throw new TypeError("invalid plaintext size (must be multiple of segmentSize bytes)");
+        }
+        const segmentSize = this.segmentSize / 8;
+        const ciphertext = new Uint8Array(plaintext);
+        for (let i = 0; i < ciphertext.length; i += segmentSize) {
+            const xorSegment = this.aes.encrypt(__classPrivateFieldGet(this, _CFB_shiftRegister, "f"));
+            for (let j = 0; j < segmentSize; j++) {
+                ciphertext[i + j] ^= xorSegment[j];
+            }
+            __classPrivateFieldGet(this, _CFB_instances, "m", _CFB_shift).call(this, ciphertext.subarray(i));
+        }
+        return ciphertext;
+    }
+    decrypt(ciphertext) {
+        if (8 * ciphertext.length % this.segmentSize) {
+            throw new TypeError("invalid ciphertext size (must be multiple of segmentSize bytes)");
+        }
+        const segmentSize = this.segmentSize / 8;
+        const plaintext = new Uint8Array(ciphertext);
+        for (let i = 0; i < plaintext.length; i += segmentSize) {
+            const xorSegment = this.aes.encrypt(__classPrivateFieldGet(this, _CFB_shiftRegister, "f"));
+            for (let j = 0; j < segmentSize; j++) {
+                plaintext[i + j] ^= xorSegment[j];
+            }
+            __classPrivateFieldGet(this, _CFB_instances, "m", _CFB_shift).call(this, ciphertext.subarray(i));
+        }
+        return plaintext;
+    }
+}
+exports.CFB = CFB;
+_CFB_iv = new WeakMap(), _CFB_shiftRegister = new WeakMap(), _CFB_instances = new WeakSet(), _CFB_shift = function _CFB_shift(data) {
+    const segmentSize = this.segmentSize / 8;
+    // Shift the register
+    __classPrivateFieldGet(this, _CFB_shiftRegister, "f").set(__classPrivateFieldGet(this, _CFB_shiftRegister, "f").subarray(segmentSize));
+    __classPrivateFieldGet(this, _CFB_shiftRegister, "f").set(data.subarray(0, segmentSize), 16 - segmentSize);
+};
+//# sourceMappingURL=mode-cfb.js.map