DEPLOYMENT_QUEUE.md

DataLens submits commits to DEPLOYMENT_QUEUE.md to request deployments, which are reviewed by the Ops Engineer. DataLens agent deployment requests are appended to DEPLOYMENT_QUEUE.md for review and approval by Ops Engineer. Ops Engineer approves deployments listed in DEPLOYMENT_QUEUE.md and authorizes execution. DataLens uses DEPLOYMENT_QUEUE.md to track deployment requests and statuses via the Ops Engineer workflow.