QA-2279: add OrganizationEventScene to the seeder

[awiester-bw]

🎟️ Tracking

https://bitwarden.atlassian.net/browse/QA-2279

📔 Objective

The SeederApi can create organizations, members, collections, and groups, but has no way to create audit events. This blocks per-test seeding for the Events Public API test class, whose positive cases read events back from GET /public/events and need an org that already has some. This adds OrganizationEventScene, mirroring OrganizationGroupScene: it resolves the org, then writes Count audit-event rows (default 2) for it through IEventRepository, returning how many were seeded. The reflection-based scene registration picks it up automatically by class name.

It targets the self-host SQL event store ([dbo].[Event]), which is what qa-automation runs, and GET /public/events reads that same store there. The cloud Table Storage path (which needs EventTableEntity indexing) is out of scope and noted on the ticket. Verified by a passing build (0 warnings, warnings-as-errors on), dotnet format --verify-no-changes, and the pr-review-toolkit agent pass. No scene has a dedicated test harness in this repo (sibling scenes are untested), so no unit test was added, consistent with precedent.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 63.41%. Comparing base (1581b9b) to head (3eded26).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8175   +/-   ##
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  Coverage   63.41%   63.41%           
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  Files        2339     2339           
  Lines      101533   101533           
  Branches     9179     9179           
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  Hits        64384    64384           
  Misses      34935    34935           
  Partials     2214     2214           

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[theMickster]

Couple items comments for consideration; not necessarily must fix items at this point.

[theMickster]

I'm good with these changes.
Heads up @MGibson1 that we have a new scene incoming. I had Andrew add an upper boundary/guard/validation on the max number of events to create to keep the scene focused as we're preferring. Hope that's alright with you that we're making a set of mock events this way.