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/completion.py

@@ -0,0 +1,55 @@
+import argparse
+import sys
+from importlib.resources import files
+
+try:
+    import shtab
+except ImportError:
+    pass
+
+
+class _MissingCompletionAction(argparse.Action):
+    def __call__(self, parser, namespace, values, option_string):
+        print("Install keyring[completion] for completion support.", file=sys.stderr)
+        parser.exit(1)
+
+
+def add_completion_notice(parser):
+    """Add completion argument to parser."""
+    parser.add_argument(
+        "--print-completion",
+        choices=["bash", "zsh", "tcsh"],
+        action=_MissingCompletionAction,
+        help="print shell completion script",
+    )
+    return parser
+
+
+def get_action(parser, option):
+    (match,) = (action for action in parser._actions if option in action.option_strings)
+    return match
+
+
+def install_completion(parser):
+    preamble = dict(
+        bash=files(__package__)
+        .joinpath('backend_complete.bash')
+        .read_text(encoding='utf-8'),
+        zsh=files(__package__)
+        .joinpath('backend_complete.zsh')
+        .read_text(encoding='utf-8'),
+    )
+    shtab.add_argument_to(parser, preamble=preamble)
+    get_action(parser, '--keyring-path').complete = shtab.DIR
+    get_action(parser, '--keyring-backend').complete = dict(
+        bash='_keyring_backends',
+        zsh='backend_complete',
+    )
+    return parser
+
+
+def install(parser):
+    try:
+        install_completion(parser)
+    except NameError:
+        add_completion_notice(parser)