Fix mutation of params bug

- `taskScript` was being updated every time the script was run

src/np_workflows/shared/base_experiments.py

@@ -1,6 +1,7 @@
 import abc
 import configparser
 import contextlib
+import copy
 import enum
 import functools
 import pathlib
@@ -677,14 +678,14 @@ def camstim_script(self) -> upath.UPath:
 
     def run_script(self, stim: Literal['sound_test', 'mapping', 'task', 'opto', 'optotagging', 'spontaneous', 'spontaneous_rewards']) -> None:
 
-        params = getattr(self, f'{stim.replace(" ", "_")}_params')
+        params = copy.deepcopy(getattr(self, f'{stim.replace(" ", "_")}_params'))
 
         # add mouse and user info for MPE
         params['mouse_id'] = str(self.mouse.id)
         params['user_id'] = self.user.id if self.user else 'ben.hardcastle'
 
-        script: str = params['taskScript']
-        params['taskScript'] = (self.task_script_base / script).as_posix()
+        if self.task_script_base not in params['taskScript']:
+            params['taskScript'] = (self.task_script_base / params['taskScript']).as_posix()
 
         if self.is_pretest:
             params['maxFrames'] = 60 * 15