Onboard rocm-examples for subscription service (Phase 2 B.2)

Phase: 2B
Labels: quartz, phase-2, onboarding
Blocked by: Phase 2 B1 (test repo validation passed), Phase 2 A2 (onboarding docs ready)

Context

After the push notification flow is validated on the test repository, onboard the
first real downstream subscriber (rocm-examples). This involves coordinating with
the rocm-examples maintainers, installing Quartz Conveyor, and adding their entry
to config/subscriber.yml.

Reference: RFC-0011 (ROCm/TheRock#3728 / docs/rfcs/RFC0011-Quartz-CICD-Datahub.md in ROCm/TheRock once merged) — Phase 2, Section B.

Tasks

• Coordinate with rocm-examples maintainers: share docs/push-subscription.md
  and agree on which events and pipelines they subscribe to
• rocm-examples installs Quartz Conveyor app in their repository
• rocm-examples adds templates/subscriber-push.yml (or equivalent) to their
  repository
• Open onboarding PR to ROCm/quartz adding rocm-examples to
  config/subscriber.yml using the .github/PULL_REQUEST_TEMPLATE/new-subscriber.md
  template
• Validate end-to-end with a real TheRock nightly trigger

Notes

• rocm-examples is the starting point; additional subscribers follow the same process
  independently and do not need a dedicated issue.

Start with docs/push-subscription.md and the subscriber onboarding template at .github/PULL_REQUEST_TEMPLATE/new-subscriber.md, then review config/subscriber.yml. Coordinate the listed event and pipeline choices with rocm-examples, confirm their Conveyor installation and subscriber-push.yml, open the onboarding PR, and validate it with a real TheRock nightly trigger.