Fixes #8886. Add integration test coverage for CyberArk Vault alternative authentication methods

[JiriOndrusek]

requires #8894 to be merged

Summary

• Add integration tests for three CyberArk Vault authentication methods: username/password, pre-authenticated token, and custom ConjurClient via CDI registry
• Add ConjurClientProducer CDI bean with proper @Disposes lifecycle management
• Rename config properties from read/write to reader/writer for clarity
• Change container log consumers to debug level to reduce noise
• Update README.adoc with optional env vars for alternative auth methods

Dependencies

Depends on #8894 (fix/8884) — this PR is stacked on top of it.

Test plan

• testGetSecretByPassword — creates secret, retrieves via password auth
• testGetSecretByToken — creates secret, retrieves via pre-authenticated token
• testGetSecretByClient — creates secret, retrieves via CDI-injected ConjurClient
• testUnauthorizedFailure — verifies 403 for unauthorized create (renamed for log clarity)

🤖 Generated with Claude Code

[jamesnetherton]

Not sure if the withLogConsumer changes were intended? If so, probably better to keep the original log level. Makes it easier to debug for CI failures etc.

[jamesnetherton]

@JiriOndrusek please rebase & address review feedback.

[JiriOndrusek]

@JiriOndrusek please rebase & address review feedback.

will do, thanks!