docs: note MariaDB support in README

[robertsilen]

Summary

Documents that CloudStack uses a MySQL-compatible database. The Docker development setup in tools/docker/docker-compose.yml uses MariaDB (mariadb:10.0); the README only mentioned MySQL in the cryptographic software notice.

Documentation only; no code or deployment changes.

Test plan

• README only

[boring-cyborg]

Congratulations on your first Pull Request and welcome to the Apache CloudStack community! If you have any issues or are unsure about any anything please check our Contribution Guide (https://github.com/apache/cloudstack/blob/main/CONTRIBUTING.md)
Here are some useful points:

• In case of a new feature add useful documentation (raise doc PR at https://github.com/apache/cloudstack-documentation)
• Be patient and persistent. It might take some time to get a review or get the final approval from the committers.
• Pay attention to the quality of your code, ensure tests are passing and your PR doesn't have conflicts.
• Please follow ASF Code of Conduct for all communication including (but not limited to) comments on Pull Requests, Issues, Mailing list and Slack.
• Be sure to read the CloudStack Coding Conventions.
  Apache CloudStack is a community-driven project and together we are making it better 🚀.
  In case of doubts contact the developers at:
  Mailing List: dev@cloudstack.apache.org (https://cloudstack.apache.org/mailing-lists.html)
  Slack: https://apachecloudstack.slack.com/

[bernardodemarco]

@robertsilen, thanks for the PR!

@robertsilen, do you think it is required to mention that The Docker development setup in tools/docker/docker-compose.yml uses MariaDB? I think that only mentioning that both MariaDB and MySQL are supported would be enough here

[winterhazel]

@robertsilen, thanks for the PR!

@robertsilen, do you think it is required to mention that The Docker development setup in tools/docker/docker-compose.yml uses MariaDB? I think that only mentioning that both MariaDB and MySQL are supported would be enough here

+1

I think that something like this would be better:

* CloudStack requires a MySQL-compatible database (MariaDB or MySQL), and uses native database encryption functionality.

[robertsilen]

@bernardodemarco @winterhazel Thanks for the review — agreed. I've dropped the Docker compose reference and simplified the line to:

CloudStack requires a MySQL-compatible database (MariaDB or MySQL), and uses native database encryption functionality.

Pushed to the branch.

[winterhazel]

LGTM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 18.11%. Comparing base (a0aafe2) to head (4675461).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #13238      +/-   ##
============================================
+ Coverage     18.10%   18.11%   +0.01%     
- Complexity    16746    16758      +12     
============================================
  Files          6037     6037              
  Lines        542933   542783     -150     
  Branches      66487    66454      -33     
============================================
+ Hits          98283    98322      +39     
+ Misses       433602   433416     -186     
+ Partials      11048    11045       -3     

Flag	Coverage Δ
uitests	3.51% <ø> (ø)
unittests	19.28% <ø> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.