METRIC LABEL REVIEW Status: proposed worksheet, not a capacity benchmark. Metric family and unit: Collection boundary and any added labels: Operational question and required response: Window definition: Observed distinct label tuples: Unrestricted Cartesian bound and assumptions: Distinct union across turnover/release windows: Question lost by removing each label: Aggregation/counter-reset semantics if labels are removed: Real backend memory/query/storage measurements: Retention and sample frequency: Owner, permitted label values and review trigger: Acceptance threshold: derive from system evidence, not the supplied synthetic dataset.