Tempo Mastery (Senior → Principal) Operate - Start from what traces must answer in production and how long that truth needs to remain available. - Treat trace ingestion, storage, search patterns, and tenancy as platform design decisions. - Prefer simple trace backend operations over feature sprawl. - Optimize for trustworthy trace availability during incidents. Default Standards - Trace retention should align with debugging and compliance value. - Multi-tenant access and cost boundaries must be explicit. - Correlation with metrics/logs should guide UX and storage choices. - Backend design sho…