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feat(output): prometheus-scrape pull endpoint (PIPE-1488, BP-469) - #321
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Proposed Change
Adds a
prometheus-scrapeoutput: a metrics-only pull endpoint. It hosts an HTTP/metricsendpoint in Prometheus text exposition format, so a Prometheus server or the collectorprometheusreceiverscrapes blitz directly. Sibling to the push-basedprometheus-remote-writeoutput; both serialize from the sharedinternal/prommapmodel.The output keeps the latest value per series (name, type, label set) in an in-memory registry and serves a snapshot on each scrape.
By default no explicit timestamp is written and the scraper stamps at scrape time (idiomatic).
Option
emitTimestamps: trueappends each sample's millisecond timestamp (rare, but does exist in the wild).Hand-rolled as a Round 3 output now. Will need to migrate to the later Effector / Push Core server model.
Checklist