HOLD: Test workshop log colleague visibility and person dropdown scoping

[maebeale]

What is the goal of this PR and why is this important?

• Adds test coverage for workshop log index page scoping by organization affiliation
• Verifies that the person dropdown follows the same affiliation rules as the organization dropdown
• Ensures non-admin users only see colleague logs and colleague names from their affiliated organizations

How did you approach the change?

• Added "colleague workshop log visibility" context with two specs:
  • Logs from colleagues in the same org are visible
  • Logs from unaffiliated orgs are hidden
• Added "person filtering" context with two specs:
  • Person dropdown shows only affiliated colleagues for non-admins
  • Person dropdown shows all people with access for admins
• No code changes needed — existing policy scopes already enforce the correct behavior

Anything else to add?

• All 17 request specs pass (15 existing + 2 pending xits unchanged)

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