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/scripts/testing/ws_load_test.py.bak

@@ -0,0 +1,54 @@
+from __future__ import annotations
+
+import asyncio
+import json
+from contextlib import asynccontextmanager
+from typing import List
+
+import websockets
+
+DEFAULT_WS_URL = "ws://127.0.0.1:8000/rpc/ws"
+BLOCK_TOPIC = "/blocks"
+TRANSACTION_TOPIC = "/transactions"
+
+
+async def producer(ws_url: str, interval: float = 0.1, total: int = 100) -> None:
+    async with websockets.connect(f"{ws_url}{BLOCK_TOPIC}") as websocket:
+        for index in range(total):
+            payload = {
+                "height": index,
+                "hash": f"0x{index:064x}",
+                "parent_hash": f"0x{index-1:064x}",
+                "timestamp": "2025-01-01T00:00:00Z",
+                "tx_count": 0,
+            }
+            await websocket.send(json.dumps(payload))
+            await asyncio.sleep(interval)
+
+
+async def consumer(name: str, ws_url: str, path: str, duration: float = 5.0) -> None:
+    async with websockets.connect(f"{ws_url}{path}") as websocket:
+        end = asyncio.get_event_loop().time() + duration
+        received = 0
+        while asyncio.get_event_loop().time() < end:
+            try:
+                message = await asyncio.wait_for(websocket.recv(), timeout=1.0)
+            except asyncio.TimeoutError:
+                continue
+            received += 1
+            if received % 10 == 0:
+                print(f"[{name}] received {received} messages")
+        print(f"[{name}] total received: {received}")
+
+
+async def main() -> None:
+    ws_url = DEFAULT_WS_URL
+    consumers = [
+        consumer("blocks-consumer", ws_url, BLOCK_TOPIC),
+        consumer("tx-consumer", ws_url, TRANSACTION_TOPIC),
+    ]
+    await asyncio.gather(producer(ws_url), *consumers)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())