ci(mypy): install types stubs and add import-untyped ignores for optional runtime imports

Author: Arturo R Montesinos

requirements-dev.txt

@@ -3,3 +3,8 @@ ruff==0.6.9
 mypy==1.11.2
 build==1.2.2
 pre-commit==4.0.1
+
+# Stubs for optional third-party deps used in type checking
+types-PyYAML
+types-tabulate
+types-tqdm

src/cli.py

@@ -242,8 +242,7 @@ def render(obj: Any, args: argparse.Namespace) -> None:
         if not _HAVE_YAML:
             print("YAML output requested but PyYAML is not installed.", file=sys.stderr)
             sys.exit(2)
-        import yaml as _yaml
-
+        import yaml as _yaml  # type: ignore[import-untyped]
         print(_yaml.safe_dump(_to_serializable(obj), sort_keys=False, allow_unicode=True))
         return
 
@@ -270,7 +269,7 @@ def render(obj: Any, args: argparse.Namespace) -> None:
             return
         # Fallback to tabulate
         if _HAVE_TABULATE:
-            from tabulate import tabulate as _tabulate
+            from tabulate import tabulate as _tabulate  # type: ignore[import-untyped]
 
             print(
                 _tabulate(