AI-generated Sonarqube issue remediation: remediation_branch-2024-08-23_18-01 -> master

[ovkhasch]

From 19 remediated issues 4 require additional actions

Issue Key	Message	Action
01bb1f7b-70e7-46c7-8440-e1386614f499	Define and throw a dedicated exception instead of using a generic one.	Ensure that the new custom exception PetclinicTestException is used consistently across the codebase where applicable, replacing any other generic exceptions that may be thrown in similar contexts.
28b4ae57-859b-4ab5-9d53-af48d9a3a5ba	Revoke and change this password, as it is compromised.	Ensure that the environment variable MYSQL_PASSWORD is set in the deployment environment to avoid application startup failures.
68aa06f1-0541-4af8-aaf1-10f47ac63914	Make sure this database password gets changed and removed from the code.	Ensure that the environment variable DB_PASSWORD is set correctly in all environments where the application is deployed.
4182d123-061d-4e6b-93f3-da05b5b786be	Rename field "vets"	Verify that all references to the renamed field 'veterinarianList' in other parts of the codebase are updated accordingly.