fix(archive): skip categories with zero or unset days config

src/repocat/cli/archive.py

@@ -28,7 +28,7 @@ def archive_repo(source: Path, target_dir: Path, dry_run: bool) -> Path:
         return archive_path
 
     with open(archive_path, "wb") as f:
-        cctx = zstandard.ZstdCompressor(level=20)
+        cctx = zstandard.ZstdCompressor(level=20, threads=-1)
         with cctx.stream_writer(f) as compressor:
             with tarfile.open(fileobj=compressor, mode="w|") as tar:
                 tar.add(source, arcname=source.name)
@@ -70,6 +70,9 @@ def run(
         if category and cat.config.name not in category:
             continue
         
+        if cat.config.days == 0 or cat.config.days is None:
+            continue
+
         limit_days = cat.config.days if cat.config.days is not None else older_than
 
         for repo in cat.repos: