Add AsyncAPI and JSON-RPC contract support

[slusset]

Summary

• add first-class AsyncAPI and JSON-RPC contract support alongside existing OpenAPI tooling
• extend example specs, fixtures, graph/evidence generation, CLI, and the GitHub Action to recognize all supported contract families
• add regression coverage and ignore .claude/settings.local.json on this branch

Verification

• npm test
• node bin/idd.js validate all --json

Closes #26

[github-actions]

IDD Compliance Review

Check	Status	Errors	Warnings
Contracts	✅	0	0
Traceability	✅	0	0
Front-Matter	✅	0	0
Capability Scope	✅	0	0
Fixtures	✅	0	0
Models	✅	0	0
Journey Maps	✅	0	0
OpenAPI Lint	✅	0	—
Gherkin Lint	✅	0	—

✅ Contracts

Info

• specs/contracts/asyncapi/audit-events.yaml: validated 1 operation
• specs/contracts/json-rpc/account-service.yaml: validated 1 operation
• specs/contracts/openapi/api.yaml: validated 2 operations
• Validated 3 contract file(s)

✅ Traceability

Info

• Found 1 persona file(s)
• Checked 1 journey file(s)
• Checked 2 story file(s)
• Checked 2 feature file(s)
• Checked 4 contract operation(s) across 3 contract file(s)
• Checked 3 fixture file(s)
• Checked 1 journey map(s)
• Checked 4 model file(s)

✅ Front-Matter

Info

• Checked 16 spec file(s): 16 passed, 0 with issues

✅ Capability Scope

Info

• Found 1 capability file(s): trade-show-signup
• Scope coverage: 12/12 files covered

✅ Fixtures

Info

• specs/fixtures/mobile-signup.fixture.yaml: valid
• specs/fixtures/quick-start-audit-event.fixture.yaml: valid
• specs/fixtures/quick-start-audit-rpc.fixture.yaml: valid
• Loaded contract families: AsyncAPI, JSON-RPC, OpenAPI
• Validated 3 fixture file(s)

✅ Models

Info

• specs/models/account.lifecycle.yaml: valid
• specs/models/account.model.yaml: valid
• specs/models/shared-value-objects.model.yaml: valid
• specs/models/trade-show-onboarding.aggregate.model.yaml: valid
• specs/models/trade-show-signup.catalog.model.yaml: valid
• Validated 5 model file(s)

✅ Journey Maps

Info

• specs/journey-maps/trade-show-signup.journey-map.yaml: valid
• Validated 1 journey map file(s)

✅ OpenAPI Lint

No results with a severity of 'error' found!

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Total: 0 error(s), 0 warning(s)

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