feat(slice-4c.8): scenario clone server-side wired to POST /api/scenarios

[lopadova]

Summary

v1.7 slice 4c.8 — Scenario Clone, server-side.

Server

• New `POST /api/scenarios` with atomic `Store.createScenario`: schema-validates body, 409 + EEXIST on id collision, 201 on create, requires `risk-map:edit`. Mirrors POST `/api/profiles` (slice 4c.3).
• 5 unit tests (happy path 201, schema rejection on empty oracles, 409 EEXIST, concurrent-POST atomicity, permission).

Store

• New `StoreProvider.createScenario(scenario): { created: boolean }` contract. Memory implements atomically via `has+set` in a single sync block. Postgres stays notImpl.
• Scaffold "every method throws not implemented" test extended.

Scope note

Admin-side Scenario Clone wizard is deferred — same rationale as slice 4c.7. The scenario detail page is currently a read-only YAML preview, and a clone modal needs either fabricated scenario fixtures or full-scenario reads from the store, both larger than this slice. The server contract is ready when that UI lands.

Test plan

• `bun run --filter @aqa/server test` (72/72)
• `bun run --filter @aqa/store test` (6/6)
• `bun run typecheck`
• `bun run lint` (4 preexisting warnings)

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Adds server-side support for “Scenario Clone” by introducing a create-only POST /api/scenarios endpoint backed by an atomic store operation, mirroring the existing profile-clone flow.

Changes:

• Introduces POST /api/scenarios that schema-validates the request, uses StoreProvider.createScenario atomically, returns 201 on create and 409 (code=EEXIST) on id collision, and requires risk-map:edit.
• Extends the store contract with createScenario(scenario): Promise<{ created: boolean }> and implements it in MemoryStore (with PostgresStore scaffolded to throw not implemented).
• Adds/extends unit tests covering the new endpoint behavior and the Postgres scaffold “not implemented” surface.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/store/test/store.test.ts	Extends Postgres scaffold tests to include createScenario as “not implemented”.
packages/store/src/types.ts	Adds StoreProvider.createScenario atomic-create contract.
packages/store/src/postgres.ts	Adds createScenario stub that throws not implemented.
packages/store/src/memory.ts	Implements createScenario with create-only semantics returning { created }.
packages/server/test/api.test.ts	Adds POST /api/scenarios tests: 201, 400 schema failure, 409 EEXIST, concurrency atomicity, permission.
packages/server/src/api.ts	Adds POST /api/scenarios handler wired to ctx.store.createScenario with correct status codes and permission.