Rename package to searchbox

This commit renames the package from vector-search-mcp to searchbox. The
package imports and executable name are updated accordingly.

tests/test_engine/test_integration.py

@@ -3,8 +3,8 @@ from unittest.mock import AsyncMock, MagicMock, patch
 import pytest
 from qdrant_client import models
 
-from vector_search_mcp.engine import Backend, get_engine
-from vector_search_mcp.models import Match, MatchAny, MatchExclude, SearchRow
+from searchbox.engine import Backend, get_engine
+from searchbox.models import Match, MatchAny, MatchExclude, SearchRow
 
 
 class TestEngineIntegration:
@@ -15,10 +15,10 @@ class TestEngineIntegration:
         """Setup complete mocked engine environment"""
         with (
             patch(
-                "vector_search_mcp.engine.qdrant_engine.Settings"
+                "searchbox.engine.qdrant_engine.Settings"
             ) as mock_settings_class,
             patch(
-                "vector_search_mcp.engine.qdrant_engine.AsyncQdrantClient"
+                "searchbox.engine.qdrant_engine.AsyncQdrantClient"
             ) as mock_client_class,
         ):
             # Setup settings
@@ -347,8 +347,8 @@ class TestEngineIntegration:
     def test_engine_type_consistency(self):
         """Test that engine types are consistent across multiple calls"""
         with (
-            patch("vector_search_mcp.engine.qdrant_engine.Settings"),
-            patch("vector_search_mcp.engine.qdrant_engine.AsyncQdrantClient"),
+            patch("searchbox.engine.qdrant_engine.Settings"),
+            patch("searchbox.engine.qdrant_engine.AsyncQdrantClient"),
         ):
             engines = [get_engine(Backend.QDRANT) for _ in range(5)]
 
@@ -356,6 +356,6 @@ class TestEngineIntegration:
             assert all(engine is engines[0] for engine in engines)
 
             # All should be QdrantEngine instances
-            from vector_search_mcp.engine.qdrant_engine import QdrantEngine
+            from searchbox.engine.qdrant_engine import QdrantEngine
 
             assert all(isinstance(engine, QdrantEngine) for engine in engines)