Features:
- ply/2: Repeat events within their duration
- compress/3: Fit pattern into time segment
- zoom/3: Extract and expand time segment
- iter/2: Rotate pattern segments leftward each cycle
- iter_back/2: Rotate pattern segments rightward each cycle
- linger/2: Extract and repeat fraction of pattern

Infrastructure:
- CI/CD with GitHub Actions (test matrix, credo, dialyzer)
- Documentation (CHANGELOG, CONTRIBUTING, LICENSE)
- 52 tests passing