## Why

CherryPick is a multi-package DI ecosystem. A system-level spec will make module boundaries, expected behaviors, and integration contracts explicit for contributors and downstream users.

## What Changes

- Define system specifications for the core DI runtime, annotations/codegen, Flutter integration, and Talker logging adapter.
- Document expected behaviors, inputs, and outputs for each module and its public integration points.

## Capabilities

### New Capabilities
- `di-runtime`: Core dependency injection runtime (scopes, modules, bindings, resolution, lifecycle).
- `annotations-and-codegen`: Annotation vocabulary and code generation behavior for DI wiring.
- `flutter-integration`: Flutter-specific provider and scope access integration.
- `talker-logging-adapter`: Observer adapter that routes DI events to Talker.

### Modified Capabilities

## Impact

- Documentation and contributor guidance for module behaviors.
- Clarifies runtime and codegen expectations for users and maintainers.
