dt-obs-ext-monitors

3rd-party test and monitor result ingestion into Dynatrace Grail via the platform events ingest API (platform/ingest/custom/events/). Use when sending external synthetic test outcomes, CI monitor data, or third-party check results to Dynatrace. Covers token scope, full event schema for external_test_run and external_test_step (including dt.security_context, ci.*, trace correlation, and pipeline-added fields), curl…