fix(tools): eager-import scan_chunks and knowledge_sql at package load

Every other built-in tool is imported here specifically to fire its
@ToolRegistry.register() decorator at package-load time; these two
were missing, so their test_registered tests only passed when some
unrelated test (via agent_manager_routes.py, channels_cmd.py, or
deep_research_setup_cmd.py) happened to import the module first in
the same process. Under pytest-xdist that's worker-distribution
dependent, so adding an unrelated test file could flip either test
from pass to fail.

src/openjarvis/tools/__init__.py

@@ -142,4 +142,14 @@ try:
 except ImportError:
     pass
 
+try:
+    import openjarvis.tools.scan_chunks  # noqa: F401
+except ImportError:
+    pass
+
+try:
+    import openjarvis.tools.knowledge_sql  # noqa: F401
+except ImportError:
+    pass
+
 __all__ = ["BaseTool", "ToolExecutor", "ToolSpec"]