Enable password protection for Redis

[FreddleSpl0it]

Contribution Guidelines

• I've read the contribution guidelines and wholeheartedly agree them

What does this PR include?

Short Description

Secure Redis with a password

Affected Containers

• Rspamd
• PHPFPM
• SOGo
• Dovecot
• Postfix
• Acme
• Netfilter
• Watchdog
• DockerApi

Did you run tests?

Yes

What did you tested?

• Tested successful logging to Redis for SOGo, Postfix, and Dovecot by verifying logs in the mailcow UI.
• Confirmed that quota and quarantine notifications are triggered successfully.
• Verified that Netfilter and DockerAPI start successfully and can subscribe to Redis Pub/Sub.
• Checked that PHPFPM can read and write to Redis, and sessions are stored successfully.
• Checked that Acme can successfully request a certificate.
• Verified that Watchdog reports Redis as healthy.

What were the final results? (Awaited, got)

The result was that each changed component could still successfully connect to Redis with the password.