feat(aci): Write to IncidentGroupOpenPeriod

[ceorourke]

#97697 but it's behind a feature flag this time so we can toggle it on and off, plus converts incident projects to a list rather than passing a queryset. See this commit for the only change in this from the original implementation.

[seer-by-sentry]

Potential bug: The call to AlertRuleDetector.objects.get() lacks error handling, which will cause a server crash if the object does not exist, breaking issue ingestion.

• Description: The method create_from_occurrence calls AlertRuleDetector.objects.get(detector_id=detector_id) without handling the AlertRuleDetector.DoesNotExist exception. The detector_id value, derived from occurrence.evidence_data, can be missing or invalid. Other parts of the codebase, such as in src/sentry/incidents/grouptype.py, consistently wrap similar queries in try...except blocks, establishing a pattern that this is a known and expected failure case. An unhandled DoesNotExist exception will propagate up the call stack, causing a server crash during the critical issue ingestion process.

• Suggested fix: Wrap the AlertRuleDetector.objects.get() call in a try...except AlertRuleDetector.DoesNotExist block. In the except block, log a warning and handle the case gracefully, for example by setting alert_id to None and allowing execution to continue. This matches established patterns elsewhere in the codebase.
  _{severity: 0.85, confidence: 0.95}

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[codecov]

Codecov Report

❌ Patch coverage is 80.88235% with 13 lines in your changes missing coverage. Please review.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...workflow_engine/models/incident_groupopenperiod.py	80.35%	11 Missing ⚠️
src/sentry/incidents/logic.py	66.66%	1 Missing ⚠️
src/sentry/issues/ingest.py	87.50%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #97906   +/-   ##
=======================================
  Coverage   80.65%   80.65%           
=======================================
  Files        8591     8591           
  Lines      378854   378910   +56     
  Branches    24660    24660           
=======================================
+ Hits       305561   305611   +50     
- Misses      72924    72930    +6     
  Partials      369      369           

[saponifi3d]

flag looks good, hopefully we can learn some more about the problems by easing in traffic 🙏

[sentry-io]

Suspect Issues

This pull request was deployed and Sentry observed the following issues:

• ‼️ IntegrityError: duplicate key value violates uniqu... in prod

• ‼️ IntegrityError: duplicate key value violates uniqu... in prod

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