[DC-727] Enrollment checker: state-aware assets and per-state build (1/8)

[jhernandez-cfa]

🔗 Jira ticket

DC-727

✍️ Description

Stack PR 1 of 8 — bottom of the stack.

Adds the DC artwork and the checkerAssetPath resolver, switches the checker components off hardcoded image paths onto state-aware lookups, and threads the STATE env var through next.config.ts, i18n-init, and the CI matrix so the app builds per state.

Focus: the resolver contract and the build plumbing. Every PR above this one depends on it.

Verified locally: checker lint, typecheck, tests, and static export for both CO and DC.

🔗 Links to related PRs

Part of the DC-727 stack (review bottom-up):

1. [DC-727] Enrollment checker: state-aware assets and per-state build (1/8) #642 — state-aware assets + per-state build
2. [DC-727] Enrollment checker: per-state page and flow config (2/8) #643 — per-state page config
3. [DC-727] Enrollment checker: single-child submission flow (3/8) #644 — single-child submission flow
4. [DC-727] Enrollment checker: results outcomes and DC content (4/8) #645 — results outcomes + DC content
5. [DC-727] Checker features endpoint: income screening and apply flags (5/8) #646 — checker features endpoint (backend)
6. [DC-727] Enrollment checker: income screening and apply link UI (6/8) #647 — income screening + apply link UI
7. [DC-727] Enrollment checker: enrollment season awareness (7/8) #648 — enrollment season awareness
8. [DC-727] Enrollment checker: config examples and flag docs (8/8) #649 — config examples + flag docs

✅ Completion tasks

• Added relevant tests
• Meets acceptance criteria in ticket
• Configuration changes:
  • If new environment variables are added, update in Tofu
  • If new environment secrets are added, update in Tofu and set in AWS Secret Manager
  • If you're adding an appsetting, add it to the requisite example file, and update it in the AWS AppConfig
  • If appsetttings are changed, update in AWS AppConfig

[github-actions]

✅ State label added — thanks!