DP to CA bug

Description

By running PDLC on CODECO with the ICOM's environmet the following issue happens when an application is deployed:

Directory '/data/CA/' already exists.
Directory '/data/GNN/' already exists.
Directory '/data/RL/' already exists.Directory '/data/min_max/' already exists.
[RL - INFO]- data exist the collection has begun

[GNNs - INFO]- data exist the collection has begun
Exception in thread Thread-4 (use_CA):
Traceback (most recent call last):
  File "/usr/local/lib/python3.12/threading.py", line 1075, in _bootstrap_inner
    self.run()
  File "/usr/local/lib/python3.12/threading.py", line 1012, in run
    self._target(*self._args, **self._kwargs)
  File "/app/gatherer.py", line 65, in use_CA
[INFO] - 2024-10-17 10:38:07.495049: Files /data/RL/test_integracio.csv and /data/RL/test_nodes.csv updated successfully
    CA_operations(CA_list)
  File "/app/pp_module/ca.py", line 108, in CA_operations
    ca_df[feature] = ca_df[feature].str.extract(r'(\d+)').astype(float)
                     ^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/pandas/core/generic.py", line 6299, in __getattr__
[INFO] - 2024-10-17 10:38:07.503593: File /data/GNN/data_GNN.csv updated successfully
    return object.__getattribute__(self, name)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/pandas/core/accessor.py", line 224, in __get__
    accessor_obj = self._accessor(obj)
                   ^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/pandas/core/strings/accessor.py", line 191, in __init__
    self._inferred_dtype = self._validate(data)
                           ^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/site-packages/pandas/core/strings/accessor.py", line 245, in _validate
    raise AttributeError("Can only use .str accessor with string values!")
AttributeError: Can only use .str accessor with string values!. Did you mean: 'std'?
Directory '/data/GNN/' already exists.
Directory '/data/min_max/' already exists.

The above makes PDLC-DP unable to provide the needed CSV file of CA.

Possible Solution

Because of the Exeption, anexpected String values are passing to PDLC-PP by PDLC-Gatherer causing PP to fail. Either the Gatherer should handle this by making the values numeric or PP should handle this by being able to handle string values.