Builds a persistent flakiness infrastructure dashboard from JUnit XML or JSON CI run history: defines the flake-rate metric (failures per test over a configurable window), authors the data model, generates a Grafana time-series panel JSON or configures a Datadog CI Visibility view, derives the quarantine-candidate query, and wires trend alerts. Also generates the periodic (weekly / monthly) test-suite trend report - total runs, suite duration, flakiness rate, top failing tests, time-to-green per PR, week-over-week deltas - as a markdown summary for a team Slack channel or wiki page. Use when a team needs a long-lived observability surface for test reliability, or a scheduled comparable health report on top of it.