fix: resolve lint errors (undefined var, unused import)

Author: DeveshParagiri

extropy/cli/commands/sample.py

@@ -147,7 +147,7 @@ def sample_command(
         f"Loaded scenario: [bold]{scenario_name}[/bold] "
         f"({len(merged_attributes)} attributes: {len(pop_spec.attributes)} base + {len(extended_attrs)} extended)",
         scenario=scenario_name,
-        base_population=base_pop_ref,
+        base_population=f"{pop_name}.v{pop_version}",
         attribute_count=len(merged_attributes),
         agent_count=count,
     )

extropy/core/models/scenario.py

@@ -18,7 +18,7 @@
 from datetime import datetime
 from enum import Enum
 from pathlib import Path
-from typing import TYPE_CHECKING, Any, Literal
+from typing import TYPE_CHECKING, Literal
 
 import yaml
 from pydantic import BaseModel, Field