Summary

Exposes DynamoDB Streams read-side behaviour suitable for local integration tests and implements / wires Kinesis streaming destination handling so stacks using aws_dynamodb_kinesis_streaming_destination (or equivalent) can be exercised against MiniStack.

What changed

• ministack/services/dynamodb_streams.py — stream records / iterator semantics.
• Extensions to ministack/services/dynamodb.py and ministack/services/kinesis.py.
• Router / app registration as needed.
• New tests: tests/test_dynamodb_streams.py, tests/test_dynamodb_kinesis_destination.py, tests/conftest.py fixture updates.
• README and CHANGELOG updated.

How to test

$py = git diff main...HEAD --name-only -- ministack/ | Where-Object { $_ -match '\.py$' }
if ($py) { ruff check @py }

pytest tests/test_dynamodb_streams.py tests/test_dynamodb_kinesis_destination.py -v --tb=short

PR checklist

• Service code in ministack/services/
• app.py / router.py updated
• tests/conftest.py fixtures where needed
• Tests added
• Ruff: no new issues in ministack/ .py files this PR changes (scoped check vs main; see Ruff / lint above)
• README.md / CHANGELOG.md updated