Alerting/Annotations: Prevent panics from composite store jobs from crashing Grafana (#83459)
* Don't directly use pointer to json
* Don't crash entire process if a store job panics
* Add debug logs when failing to parse/handle Loki entries
(cherry picked from commit af528d2f66)
Co-authored-by: William Wernert <william.wernert@grafana.com>