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/subscriber-polling.d.ts

@@ -0,0 +1,100 @@
+import type { AbstractProvider, Subscriber } from "./abstract-provider.js";
+import type { EventFilter, OrphanFilter, ProviderEvent } from "./provider.js";
+/**
+ *  Return the polling subscriber for common events.
+ *
+ *  @_docloc: api/providers/abstract-provider
+ */
+export declare function getPollingSubscriber(provider: AbstractProvider, event: ProviderEvent): Subscriber;
+/**
+ *  A **PollingBlockSubscriber** polls at a regular interval for a change
+ *  in the block number.
+ *
+ *  @_docloc: api/providers/abstract-provider
+ */
+export declare class PollingBlockSubscriber implements Subscriber {
+    #private;
+    /**
+     *  Create a new **PollingBlockSubscriber** attached to %%provider%%.
+     */
+    constructor(provider: AbstractProvider);
+    /**
+     *  The polling interval.
+     */
+    get pollingInterval(): number;
+    set pollingInterval(value: number);
+    start(): void;
+    stop(): void;
+    pause(dropWhilePaused?: boolean): void;
+    resume(): void;
+}
+/**
+ *  An **OnBlockSubscriber** can be sub-classed, with a [[_poll]]
+ *  implmentation which will be called on every new block.
+ *
+ *  @_docloc: api/providers/abstract-provider
+ */
+export declare class OnBlockSubscriber implements Subscriber {
+    #private;
+    /**
+     *  Create a new **OnBlockSubscriber** attached to %%provider%%.
+     */
+    constructor(provider: AbstractProvider);
+    /**
+     *  Called on every new block.
+     */
+    _poll(blockNumber: number, provider: AbstractProvider): Promise<void>;
+    start(): void;
+    stop(): void;
+    pause(dropWhilePaused?: boolean): void;
+    resume(): void;
+}
+export declare class PollingBlockTagSubscriber extends OnBlockSubscriber {
+    #private;
+    constructor(provider: AbstractProvider, tag: string);
+    pause(dropWhilePaused?: boolean): void;
+    _poll(blockNumber: number, provider: AbstractProvider): Promise<void>;
+}
+/**
+ *  @_ignore:
+ *
+ *  @_docloc: api/providers/abstract-provider
+ */
+export declare class PollingOrphanSubscriber extends OnBlockSubscriber {
+    #private;
+    constructor(provider: AbstractProvider, filter: OrphanFilter);
+    _poll(blockNumber: number, provider: AbstractProvider): Promise<void>;
+}
+/**
+ *  A **PollingTransactionSubscriber** will poll for a given transaction
+ *  hash for its receipt.
+ *
+ *  @_docloc: api/providers/abstract-provider
+ */
+export declare class PollingTransactionSubscriber extends OnBlockSubscriber {
+    #private;
+    /**
+     *  Create a new **PollingTransactionSubscriber** attached to
+     *  %%provider%%, listening for %%hash%%.
+     */
+    constructor(provider: AbstractProvider, hash: string);
+    _poll(blockNumber: number, provider: AbstractProvider): Promise<void>;
+}
+/**
+ *  A **PollingEventSubscriber** will poll for a given filter for its logs.
+ *
+ *  @_docloc: api/providers/abstract-provider
+ */
+export declare class PollingEventSubscriber implements Subscriber {
+    #private;
+    /**
+     *  Create a new **PollingTransactionSubscriber** attached to
+     *  %%provider%%, listening for %%filter%%.
+     */
+    constructor(provider: AbstractProvider, filter: EventFilter);
+    start(): void;
+    stop(): void;
+    pause(dropWhilePaused?: boolean): void;
+    resume(): void;
+}
+//# sourceMappingURL=subscriber-polling.d.ts.map