- Added `CDC::Parallel::Runtime`.
- Added `CDC::Parallel::ProcessorPool`.
- Added `CDC::Parallel::TransactionPool`.
- Added `CDC::Parallel::Router`.
- Added `CDC::Parallel::ResultCollector`.
- Added Parallel-safe processor validation.
- Added support for `CDC::Core::ChangeEvent` processing.
- Added support for `CDC::Core::TransactionEnvelope` processing.
- Added graceful shutdown behavior.
- Added RBS signatures.
- Added Minitest suite.
- Added README and example.
- Added CI and release workflows.

This release establishes the initial parallel execution runtime for the CDC Ecosystem while preserving cdc-core as the canonical orchestration layer.