feat(compat): add APIGW+SFN+DynamoDB CRUDL end-to-end test group (#45)

* feat(compat): add apigw-sfn-jsonata-crudl end-to-end test group

Full CRUDL test suite: API Gateway → SFN JSONata → DynamoDB covering
Create/Read/Update/Delete/List via StartSyncExecution integration.
Verified against both real AWS and Floci (38/38 passing).

* refactor(compat): align ApigwSfnJsonataCrudlTests with established test patterns

- Add @FlociTestGroup annotation for reflection-based discovery
- Remove hardcoded REGION/ACCOUNT constants; use ctx.region.id()
- Use unique table name via timestamp suffix
- Make setup and cleanup silent (no ctx.check calls)
- Restructure as 6 clean CRUDL checks: Create, Read, Update, List, Delete,
  Read-after-Delete
- Guard $states.result.Item access with $exists() to handle not-found case
  on both Floci and real AWS

Author: thegagne