Add exception handling for missing portfolio in list analysis

[sambles]

Add exception handling for missing portfolio in list analysis

Fix for issue #995 this doesn't prevent the issue, only stops the 500 server error and notes the problem in server logs:

Log Example:

INFO 2024-03-13 10:52:14,959 middleware 317 140008600104960 GET /v2/?format=openapi - 200
ERROR 2024-03-13 10:52:19,477 models 115 140008600104960 Analyses ID: 43 portfolio not found, test exception
Traceback (most recent call last):
  File "/var/www/oasis/src/server/oasisapi/analyses/models.py", line 314, in get_groups
    raise ValueError('test exception')
ValueError: test exception
ERROR 2024-03-13 10:52:19,508 models 115 140008600104960 Analyses ID: 44 portfolio not found, test exception
Traceback (most recent call last):
  File "/var/www/oasis/src/server/oasisapi/analyses/models.py", line 314, in get_groups
    raise ValueError('test exception')
ValueError: test exception
INFO 2024-03-13 10:52:19,514 middleware 115 140008600104960 GET /v2/analyses/

[sambles]

Test images

• coreoasis/model_worker:2.3.2rc2
• coreoasis/api_server:2.3.2rc2