community: define support and issue-triage expectations

[baokhang83]

Goal

Create a visible, measurable expectation for responding to user questions and bug reports.

Scope

• Define the public support channel and the distinction between support, bugs, feature requests, and security reports.
• Add issue templates or forms that route reports to the right channel.
• Publish triage and response targets appropriate for the project’s current maintainer capacity.
• Define a lightweight periodic review of unanswered issues and bugs.

Acceptance criteria

• Users know where to ask for help and how to report a bug.
• The project can measure whether it is meeting its stated response expectations.
• Documentation addresses Apache Maturity Model items QU50 and CO70.