Tekton started as a multi-company project (Google, Red Hat, etc.) but didn't necessarily target individual contributors for advancement.

Josh Berkus: make it clear that a solo consultant could advance to project leadership even without working for Red Hat/IBM.

Acceptance Criteria

* Document the exact path: contributor → reviewer → approver → maintainer
* Requirements for each level clearly stated
* Published and discoverable from the contribution docs
* Career advancement incentive is visible and explicit