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/lib.commonjs/providers/provider-socket.d.ts

@@ -0,0 +1,113 @@
+/**
+ *  Generic long-lived socket provider.
+ *
+ *  Sub-classing notes
+ *  - a sub-class MUST call the `_start()` method once connected
+ *  - a sub-class MUST override the `_write(string)` method
+ *  - a sub-class MUST call `_processMessage(string)` for each message
+ *
+ *  @_subsection: api/providers/abstract-provider:Socket Providers  [about-socketProvider]
+ */
+import { JsonRpcApiProvider } from "./provider-jsonrpc.js";
+import type { Subscriber, Subscription } from "./abstract-provider.js";
+import type { EventFilter } from "./provider.js";
+import type { JsonRpcApiProviderOptions, JsonRpcError, JsonRpcPayload, JsonRpcResult } from "./provider-jsonrpc.js";
+import type { Networkish } from "./network.js";
+/**
+ *  A **SocketSubscriber** uses a socket transport to handle events and
+ *  should use [[_emit]] to manage the events.
+ */
+export declare class SocketSubscriber implements Subscriber {
+    #private;
+    /**
+     *  The filter.
+     */
+    get filter(): Array<any>;
+    /**
+     *  Creates a new **SocketSubscriber** attached to %%provider%% listening
+     *  to %%filter%%.
+     */
+    constructor(provider: SocketProvider, filter: Array<any>);
+    start(): void;
+    stop(): void;
+    pause(dropWhilePaused?: boolean): void;
+    resume(): void;
+    /**
+     *  @_ignore:
+     */
+    _handleMessage(message: any): void;
+    /**
+     *  Sub-classes **must** override this to emit the events on the
+     *  provider.
+     */
+    _emit(provider: SocketProvider, message: any): Promise<void>;
+}
+/**
+ *  A **SocketBlockSubscriber** listens for ``newHeads`` events and emits
+ *  ``"block"`` events.
+ */
+export declare class SocketBlockSubscriber extends SocketSubscriber {
+    /**
+     *  @_ignore:
+     */
+    constructor(provider: SocketProvider);
+    _emit(provider: SocketProvider, message: any): Promise<void>;
+}
+/**
+ *  A **SocketPendingSubscriber** listens for pending transacitons and emits
+ *  ``"pending"`` events.
+ */
+export declare class SocketPendingSubscriber extends SocketSubscriber {
+    /**
+     *  @_ignore:
+     */
+    constructor(provider: SocketProvider);
+    _emit(provider: SocketProvider, message: any): Promise<void>;
+}
+/**
+ *  A **SocketEventSubscriber** listens for event logs.
+ */
+export declare class SocketEventSubscriber extends SocketSubscriber {
+    #private;
+    /**
+     *  The filter.
+     */
+    get logFilter(): EventFilter;
+    /**
+     *  @_ignore:
+     */
+    constructor(provider: SocketProvider, filter: EventFilter);
+    _emit(provider: SocketProvider, message: any): Promise<void>;
+}
+/**
+ *  A **SocketProvider** is backed by a long-lived connection over a
+ *  socket, which can subscribe and receive real-time messages over
+ *  its communication channel.
+ */
+export declare class SocketProvider extends JsonRpcApiProvider {
+    #private;
+    /**
+     *  Creates a new **SocketProvider** connected to %%network%%.
+     *
+     *  If unspecified, the network will be discovered.
+     */
+    constructor(network?: Networkish, _options?: JsonRpcApiProviderOptions);
+    _getSubscriber(sub: Subscription): Subscriber;
+    /**
+     *  Register a new subscriber. This is used internalled by Subscribers
+     *  and generally is unecessary unless extending capabilities.
+     */
+    _register(filterId: number | string, subscriber: SocketSubscriber): void;
+    _send(payload: JsonRpcPayload | Array<JsonRpcPayload>): Promise<Array<JsonRpcResult | JsonRpcError>>;
+    /**
+     *  Sub-classes **must** call this with messages received over their
+     *  transport to be processed and dispatched.
+     */
+    _processMessage(message: string): Promise<void>;
+    /**
+     *  Sub-classes **must** override this to send %%message%% over their
+     *  transport.
+     */
+    _write(message: string): Promise<void>;
+}
+//# sourceMappingURL=provider-socket.d.ts.map