Knowledge load utility CLI (#456)

* Knowledge loader

* More tests

tests/unit/test_cli/conftest.py

@@ -0,0 +1,48 @@
+"""
+Shared fixtures for CLI unit tests.
+"""
+
+import pytest
+from unittest.mock import AsyncMock, MagicMock
+
+
+@pytest.fixture
+def mock_websocket_connection():
+    """Mock WebSocket connection for CLI tools."""
+    mock_ws = MagicMock()
+    
+    # Create simple async functions that don't leave coroutines hanging
+    async def mock_send(data):
+        return None
+        
+    async def mock_recv():
+        return ""
+        
+    async def mock_close():
+        return None
+    
+    mock_ws.send = mock_send
+    mock_ws.recv = mock_recv
+    mock_ws.close = mock_close
+    return mock_ws
+
+
+@pytest.fixture
+def mock_pulsar_client():
+    """Mock Pulsar client for CLI tools that use messaging."""
+    mock_client = MagicMock()
+    mock_client.create_consumer = MagicMock()
+    mock_client.create_producer = MagicMock()
+    mock_client.close = MagicMock()
+    return mock_client
+
+
+@pytest.fixture
+def sample_metadata():
+    """Sample metadata structure used across CLI tools."""
+    return {
+        "id": "test-doc-123",
+        "metadata": [],
+        "user": "test-user",
+        "collection": "test-collection"
+    }