[Secure Vault] Security configuration file required when resolving already encrypted secrets

Description:
It is required to define the <APIM_HOME>/repository/conf/security/secret-conf.properties file, in order to enable Carbon level secure vault and provide other related configurations, when resolving already encrypted secrets.

keystore.identity.location=/home/wso2carbon/wso2am-3.2.0/repository/resources/security/internalKeyStore.jks
keystore.identity.type=JKS
keystore.identity.store.password=identity.store.password
keystore.identity.store.secretProvider=org.wso2.carbon.securevault.DefaultSecretCallbackHandler
secretRepositories.file.provider=org.wso2.securevault.secret.repository.FileBaseSecretRepositoryProvider
secretRepositories.file.location=repository/conf/security/cipher-text.properties
secretRepositories=file
secVault.enabled=true
keystore.identity.key.password=identity.key.password
carbon.secretProvider=org.wso2.securevault.secret.handler.SecretManagerSecretCallbackHandler
keystore.identity.key.secretProvider=org.wso2.carbon.securevault.DefaultSecretCallbackHandler
keystore.identity.alias=wso2carboninternal

Suggested Labels:
Type/Docs, Priority/Highest

Suggested Assignees:
@pubudu538 @tharindu1st

Start with the linked “Resolving already encrypted passwords during server startup” documentation page. Check whether it explains the requirement for <APIM_HOME>/repository/conf/security/secret-conf.properties and the provided settings; done means the page clearly documents the required configuration for resolving already encrypted secrets.