Flow performance audit

Template

If more than one brand is reachable, call `list_brands` first and pass `brand` on every call.

Audit Klaviyo flows. First, coverage: `query` {{"from": "email_flow_types"}} and list the core lifecycle flows (welcome, abandoned_checkout, browse_abandonment, post_purchase, winback) with no live flow - those are missing core flows; cite each flow's flow_type reason, and name any that look misclassified. Then benchmarks: `query` {{"from": "email_flow_benchmarks"}} and, per flow, compare revenue_per_recipient, placed_order_rate, click_rate and unsubscribe_rate with own_baseline (its prior 90 days) and workspace_median, always stating workspace_n. There is no benchmark below 5 Brands: a null workspace_median means no peer comparison, never an average of fewer. Rates are 0-1 fractions; flows have no bounce or spam data. Finally use `get_performance` with entity_type='flow', date_range={{"days": 30}} and flag any flow whose metrics have dropped >20% in the last 30 days vs the prior 30.