chore: add copyright headers to services, web, and examples test files

[karagozemin]

Add a per-file copyright header so ownership is visible at the file level (consistent with the root LICENSE).

Mechanical change — prepend this exact line as the first line of each file, nothing else:

// Copyright (c) 2026 Sub Rosa contributors

Add it to the following files:

• services/agent/src/bidder.test.ts
• services/agent/src/mandate-cap-negative.test.ts
• services/agent/src/mandate.test.ts
• services/appraisal-api/src/appraisal-fixtures.test.ts
• services/appraisal-api/src/appraisal.test.ts
• services/appraisal-api/src/config.test.ts
• services/auction-template/sealed-auction.smoke.test.ts
• services/keeper/src/dry-run.test.ts
• services/keeper/src/keeper.test.ts
• services/keeper/src/queue-replay.test.ts
• services/keeper/src/settlement-guard.test.ts
• services/keeper/src/status-server.test.ts
• services/keeper/src/status.test.ts
• services/keeper/src/store.test.ts
• services/keeper/src/watch-queue.test.ts
• services/keeper/src/watch.test.ts
• services/receipt-cli/src/receipt.test.ts
• apps/web/src/commands/__tests__/doctor.test.ts
• apps/web/src/components/dashboard/RoundStatusCard.test.tsx
• apps/web/src/dashboard/fixture-health-check.test.ts
• apps/web/src/demo/trace-health-check.test.ts
• apps/web/src/lib/config.test.ts
• apps/web/src/lib/round-status.test.ts
• examples/grant-scoring/src/pilot.test.ts
• examples/grant-scoring/src/reveal-readiness.test.ts
• examples/grant-scoring/src/scoring.test.ts

[achebejohnpaul]

Am a full-Stack Engineer focused on frontend, backend, APIs, automation, and modern web technologies. Passionate about solving real-world problems, contributing to open source, and delivering clean, scalable, review-ready solutions.

[achebejohnpaul]

Am a full-Stack Engineer focused on frontend, backend, APIs, automation, and modern web technologies. Passionate about solving real-world problems, contributing to open source, and delivering clean, scalable, review-ready solutions.

[emrekayat]

Can I work on this?

[grantfox-oss]

🦊 GrantFox — @emrekayat has been assigned to this issue as part of the Third Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #218)
2. Your PR will be reviewed by the Sub-Rosa-Issue maintainers

Good luck! Track your progress on GrantFox.