Fix symlink generation endpoint (#685)

* Wrong Session imported
* Provide full path to symlink target

Author: d-j-hatton

src/murfey/server/api/file_io_frontend.py

@@ -3,7 +3,7 @@
 
 from fastapi import APIRouter, Depends
 from pydantic import BaseModel
-from sqlmodel import Session, select
+from sqlmodel import select
 
 from murfey.server.api.auth import (
     MurfeySessionIDFrontend as MurfeySessionID,
@@ -15,6 +15,7 @@
 )
 from murfey.server.murfey_db import murfey_db
 from murfey.util.config import get_machine_config
+from murfey.util.db import Session
 
 logger = getLogger("murfey.server.api.file_io_frontend")
 
@@ -54,5 +55,5 @@ async def create_symlink(
         symlink_full_path.unlink()
     if symlink_full_path.exists():
         return ""
-    symlink_full_path.symlink_to(symlink_params.target)
+    symlink_full_path.symlink_to(machine_config.rsync_basepath / symlink_params.target)
     return str(symlink_params.symlink)