chore: ruff I001 — split aliased imports in mcp/server.py

ruff check --fix output. Unblocks the test workflow on main, which had
been failing on this file since the notebook MCP tool block landed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: brycewang-stanford

stata_code/mcp/server.py

@@ -62,15 +62,29 @@
 from stata_code.core._runtime import PystataNotAvailable, is_available
 from stata_code.core.notebook import (
     NotebookError,
+)
+from stata_code.core.notebook import (
     delete_cell as _notebook_delete_cell,
+)
+from stata_code.core.notebook import (
     edit_cell as _notebook_edit_cell,
+)
+from stata_code.core.notebook import (
     get_cell as _notebook_get_cell,
+)
+from stata_code.core.notebook import (
     insert_cell as _notebook_insert_cell,
+)
+from stata_code.core.notebook import (
     locate_cells as _notebook_locate_cells,
+)
+from stata_code.core.notebook import (
     outline_notebook as _notebook_outline,
 )
 from stata_code.core.run_index import (
     RunIndexError,
+)
+from stata_code.core.run_index import (
     list_runs as _list_runs,
 )
 from stata_code.core.runner import (