fix(medcat-service) - Fix access log format not being set using uvicorn worker

[alhendrickson]

This fixes the access log format to add a timestamp.

This env variable in start_service_production.sh doesnt work when using uvicorn worker. This line doesnt do anything --access-logformat="$SERVER_ACCESS_LOG_FORMAT" \

This fix hardcodes the config in and adds a note. For a later PR, we could look to support env vars for the access log as it used to exist, and remove the line from the shell. For now I'd want to get this in as is, as it at least fixes it and documents it a bit.

Behavior Before

cogstack-medcat-service-production  | Starting MedCAT Service
...
cogstack-medcat-service-production  | 172.20.0.1:33514 - "GET /api/health/live HTTP/1.1" 200
cogstack-medcat-service-production  | 172.20.0.1:40408 - "POST /api/process HTTP/1.1" 200

Behavior After

cogstack-medcat-service-production  | Starting MedCAT Service
cogstack-medcat-service-production  | Starting up the service using gunicorn server ...
cogstack-medcat-service-production  | [2025-10-28 16:37:55 +0000] [1] [INFO] Starting gunicorn 23.0.0
..
cogstack-medcat-service-production  | 2025-10-28 16:38:09,939 [ACCESS] - 172.20.0.1:60072 - "GET /api/health/live HTTP/1.1" 200 OK
...
cogstack-medcat-service-production  | 2025-10-28 16:38:23,278 [INFO] MedCatProcessor: MedCAT processor is ready
cogstack-medcat-service-production  | 2025-10-28 16:38:23,390 [ACCESS] - 172.20.0.1:60088 - "POST /api/process HTTP/1.1" 200 OK

[mart-r]

Looks alright to me.