fix: resolve per-torrent qb save paths

tests/test_cli.py

@@ -0,0 +1,59 @@
+import io
+import json
+import os
+import tempfile
+import unittest
+from contextlib import redirect_stdout
+from pathlib import Path
+
+from archive_clients.cli import main
+
+
+class ClientCliTests(unittest.TestCase):
+    def test_check_config_probes_every_qb_override_root(self):
+        with tempfile.TemporaryDirectory() as directory:
+            root = Path(directory)
+            for name in ("token", "qb-password", "syncthing-key"):
+                path = root / name
+                path.write_text(name, encoding="utf-8")
+                os.chmod(path, 0o600)
+            for name in ("qb", "qb-fast", "sync", "backups"):
+                (root / name).mkdir()
+            config = root / "client.toml"
+            config.write_text(
+                f'''client_id = "cache-1"
+display_name = "Cache 1"
+role = "cache"
+control_endpoint = "ws://control/archive_control"
+shared_token_file = "{root / "token"}"
+state_db = "{root / "state.db"}"
+backup_dir = "{root / "backups"}"
+
+[qbittorrent]
+endpoint = "http://qb"
+username = "admin"
+password_file = "{root / "qb-password"}"
+api_root = "/downloads"
+local_root = "{root / "qb"}"
+local_path_overrides = {{ "/downloads/fast" = "{root / "qb-fast"}" }}
+
+[syncthing]
+endpoint = "http://syncthing"
+api_key_file = "{root / "syncthing-key"}"
+api_root = "/sync"
+local_root = "{root / "sync"}"
+''',
+                encoding="utf-8",
+            )
+            output = io.StringIO()
+            with redirect_stdout(output):
+                self.assertEqual(main(["--config", str(config), "--check-config"]), 0)
+            reported = json.loads(output.getvalue())
+            self.assertEqual(
+                [item["root"] for item in reported["filesystems"]],
+                [str(root / "qb"), str(root / "qb-fast"), str(root / "sync")],
+            )
+
+
+if __name__ == "__main__":
+    unittest.main()