fix: resolve per-torrent qb save paths

scripts/preflight-deployment.py

@@ -134,7 +134,7 @@ from pathlib import Path
 from archive_clients.config import ClientConfig
 config=ClientConfig.load(Path(sys.argv[1]))
 value={"shared_token_file":str(config.shared_token_file)}
-value["qbittorrent"]={"api_root":str(config.qbittorrent.api_root),"local_root":str(config.qbittorrent.local_root),"password_file":str(config.qbittorrent.password_file)}
+value["qbittorrent"]={"api_root":str(config.qbittorrent.api_root),"local_root":str(config.qbittorrent.local_root),"password_file":str(config.qbittorrent.password_file),"local_path_overrides":{str(api):str(local) for api,local in config.qbittorrent.local_path_overrides}}
 value["syncthing"]={"api_root":str(config.syncthing.api_root),"local_root":str(config.syncthing.local_root),"api_key_file":str(config.syncthing.api_key_file),"local_path_overrides":{str(api):str(local) for api,local in config.syncthing.local_path_overrides}}
 print(json.dumps(value,sort_keys=True))'''
     result = subprocess.run(
@@ -174,6 +174,26 @@ raise SystemExit(0 if all(p.state == 1 for p in probes) else 1)'''
     print(result.stdout.strip())
 
 
+def require_qb_override_mappings(
+    client: dict[str, Any], qbittorrent: dict[str, Any], qb: dict[str, Any],
+) -> None:
+    """Prove every explicit qB API/local override sees the same host bytes."""
+
+    overrides = qb.get("local_path_overrides", {})
+    if not isinstance(overrides, dict):
+        raise CheckFailure("qbittorrent.local_path_overrides must be a table")
+    for api_path, local_path in overrides.items():
+        if not isinstance(api_path, str) or not isinstance(local_path, str):
+            raise CheckFailure(
+                "qbittorrent.local_path_overrides entries are invalid"
+            )
+        require_same_path(
+            f"qBittorrent override {api_path}/local mapping",
+            map_path(qbittorrent, api_path),
+            map_path(client, local_path),
+        )
+
+
 def run_hardlink_probe(
     container: str, qb_root: str, route_root: str, user: str | None = None,
 ) -> None:
@@ -298,6 +318,7 @@ def main(argv: list[str] | None = None) -> int:
             syncthing_route, client_route,
         )
         require_same_path("qBittorrent api_root/local_root", qb_api, client_qb)
+        require_qb_override_mappings(client, qbittorrent, qb)
         if client_qb.destination != client_route.destination:
             raise CheckFailure(
                 "qBittorrent and future route roots use separate client bind "