fix: recover durable route paths after restart

src/archive_clients/daemon.py

@@ -697,7 +697,22 @@ class ArchiveClientDaemon:
                 decode_message(str(row["update_json"]), control_pb2.RouteUpdate())
             )
             await outbound.put(encode(response))
-        if attempt["state"] in {"ready", "failed"}:
+        if attempt["state"] == "ready":
+            # Route readiness is durable, but this process-local lookup is
+            # not. Reconfigure (which validates the existing Syncthing folder
+            # and recreates its local directory if necessary) before replaying
+            # the stored READY updates. This is essential after a daemon or
+            # mount restart: a previously ready route may otherwise point at a
+            # path that is no longer present, and a later source-stage command
+            # would fail with a bare ENOENT.
+            configured = await asyncio.to_thread(
+                self.routes.configure,
+                spec,
+                time.monotonic() + spec.setup_timeout_seconds,
+            )
+            self._known_route_paths[spec.route_id] = configured.local_path
+            return
+        if attempt["state"] == "failed":
             return
 
         deadline = time.monotonic() + spec.setup_timeout_seconds