WAIT: Wire recipients, staff, shout-outs to affiliation helpers

[maebeale]

🤖 PR, suggested 👤 review level: 📖 Read — light-logic: view/service wiring onto existing model helpers, no migrations

Stacked on #1757 (Person read helpers). Review/merge that first — this PR's diff is shown against that branch.

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

• Use the new Person#facilitator_organization / #job_affiliation / #facilitator_affiliation helpers for display, replacing the ad-hoc affiliation filtering on the event recipients/staff pages and the shout-out credit.

How did you approach the change?

• Recipients header: program org + its city/state (facilitator side) + job title (job side); preload affiliations → organization → addresses so the new city/state cell adds no per-row queries.
• Staff cards: real-job org, gracefully falling back to the facilitator org when there's no separate job affiliation.
• Shout-out credit: real job → facilitator role → the org snapshotted on the registration.

UI Testing Checklist

• events/:id/scholarships: each recipient shows program org (linked) + city/state + real-job title (not "Facilitator").
• events/:id/staff: each card shows the real-job org, or the facilitator org when there's no job affiliation.
• "Shout outs" credits the real-job org, falling back to facilitator org, then the registration's org.

Anything else to add?

• Depends on WAIT: Facilitator/job affiliation read helpers on Person #1757; rebase onto main after that merges.