Context:

We introduced environment variables CAMUNDA_OPTIMIZE_ELASTICSEARCH_SECURITY_PASSWORD and CAMUNDA_OPTIMIZE_ELASTICSEARCH_SECURITY_USERNAME  and have had a couple of slack questions from people looking for these. Lets add them to the docs so that they're easier to find.

I have also observed a few occurrences in the forum, support and ask channel with customers attempting to run Optimize CCSM but in platform mode. I think our docs can be clearer on the required env var, currently we describe SPRING_PROFILES_ACTIVE  as "Starts Optimize in Self-Managed mode." without stating you need to set it to "ccsm".

AT:

• CAMUNDA_OPTIMIZE_ELASTICSEARCH_SECURITY_PASSWORD  is added to the docs
• CAMUNDA_OPTIMIZE_ELASTICSEARCH_SECURITY_USERNAME  is added to the docs
• check when they were introduced and backport docs accordingly
• SPRING_PROFILES_ACTIVE  docs are adjusted to be more explicit