Fix mypy issues

Author: dmsfiris

src/fek_extractor/cli.py

@@ -210,7 +210,7 @@ def main() -> None:
         help="Emit only the Table of Contents as JSON (array of parts).",
     )
 
-    args = p.parse_args()
+    args: argparse.Namespace = p.parse_args()
 
     # Translate --debug into (debug: bool, debug_pages: Optional[int])
     if args.debug is None:

src/fek_extractor/core.py

@@ -3,6 +3,7 @@
 
 import re
 from collections import OrderedDict
+from os import PathLike
 from pathlib import Path
 from typing import Any
 
@@ -16,9 +17,12 @@
 from .parsing.headers import parse_fek_header
 from .parsing.normalize import dehyphenate_text, normalize_text
 
+# Convenience alias for public API
+Pathish = str | Path | PathLike[str]
+
 
 def extract_pdf_info(
-    pdf_path: Path,
+    pdf_path: Pathish,
     include_metrics: bool = False,
     **kwargs: Any,
 ) -> dict[str, Any]:
@@ -99,7 +103,7 @@ def extract_pdf_info(
 
 
 def extract(
-    input_path: Path,
+    input_path: Pathish,
     include_metrics: bool = False,
     **kwargs: Any,
 ) -> list[dict[str, Any]]: