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/cli_env/lib64/python3.13/site-packages/keyring/util/__init__.py

@@ -0,0 +1,11 @@
+import contextlib
+
+
+def suppress_exceptions(callables, exceptions=Exception):
+    """
+    yield the results of calling each element of callables, suppressing
+    any indicated exceptions.
+    """
+    for callable in callables:
+        with contextlib.suppress(exceptions):
+            yield callable()

dev/env/cli_env/lib64/python3.13/site-packages/keyring/util/platform_.py

@@ -0,0 +1,40 @@
+import os
+import pathlib
+import platform
+
+
+def _data_root_Windows():
+    release, version, csd, ptype = platform.win32_ver()
+    root = pathlib.Path(
+        os.environ.get('LOCALAPPDATA', os.environ.get('ProgramData', '.'))
+    )
+    return root / 'Python Keyring'
+
+
+def _data_root_Linux():
+    """
+    Use freedesktop.org Base Dir Specification to determine storage
+    location.
+    """
+    fallback = pathlib.Path.home() / '.local/share'
+    root = os.environ.get('XDG_DATA_HOME', None) or fallback
+    return pathlib.Path(root, 'python_keyring')
+
+
+_config_root_Windows = _data_root_Windows
+
+
+def _config_root_Linux():
+    """
+    Use freedesktop.org Base Dir Specification to determine config
+    location.
+    """
+    fallback = pathlib.Path.home() / '.config'
+    key = 'XDG_CONFIG_HOME'
+    root = os.environ.get(key, None) or fallback
+    return pathlib.Path(root, 'python_keyring')
+
+
+# by default, use Unix convention
+data_root = globals().get('_data_root_' + platform.system(), _data_root_Linux)
+config_root = globals().get('_config_root_' + platform.system(), _config_root_Linux)