Summary\n- add AwsComprehendRedactor for AWS Comprehend DetectPiiEntities without adding AWS SDK dependencies\n- expose helpers to redact raw prompts and chat options before chaining into existing AI endpoint calls\n- add unit coverage with mocked Comprehend responses\n- add a Jsonnet-based example showing PII redaction before an OpenAI call\n\n/claim #290\n\nCloses #290\n\n## Demo\n- https://raw.githubusercontent.com/josemariano-hub/edgechains-demo-assets/main/edgechains-aws-comprehend-demo.mp4\n\n## Verification\n- npx vitest run awsComprehendRedactor.test.ts\n- npm run build