chore(download): improve error message for resolve failures

Since resolvers do not necessarily look "upstream", the error message is
now more general and simply states that the package could not be
resolved.

Signed-off-by: Christoph Steiger <[email protected]>

Author: Urist-McGit

src/debsbom/commands/download.py

@@ -118,7 +118,8 @@ def run(cls, args):
                 DownloadCmd._check_for_dsc(pkg, files)
                 downloader.register(files, pkg)
             except ResolveError:
-                logger.warning(f"not found upstream: {pkg}")
+                pkg_type = "source" if pkg.is_source() else "binary"
+                logger.warning(f"failed to resolve {pkg_type} package: {pkg}")
                 if args.json:
                     print(
                         DownloadResult(