break(kernel): 💥 Add integration extension points

[haskou]

Summary

• Adds a consumer middleware pipeline with built-in idempotency, correlation/causation and retry middleware.
• Adds metadata-aware consumer execution context and AMQP transport metadata propagation.
• Adds publisher hooks, domain-aware publish context and configurable post-publish hook error policy.
• Separates generic MessageBus from domain-specific DomainMessageBus.
• Extends ExpressKernelServer with external controllers, phase hooks, configurable middleware, controller DI integration, duplicate-run protection and an imperative HTTP pipeline registration API.
• Adds routingControllersOptions passthrough for useExpressServer, including cors, defaultErrorHandler and routing-controllers middleware classes.
• Resolves express and routing-controllers from the consumer application root so local file: installs do not accidentally use a nested package runtime.
• Adds a shared HttpErrorHandler for Express/routing-controllers applications, covering malformed JSON, payload-too-large errors, custom app handlers, HTTP status errors, flattened validation errors and unhandled 500 responses.
• Adds dependency injection overrides with useClass, useValue and useFactory, including support for unresolved references generated from external package imports.
• Keeps the instance kernel active during dependency injection so the instance API and legacy static facade stay aligned.
• Adds kernel.dependencyInjection({ containerBuild }) so applications can choose container generation explicitly, while keeping CONTAINER_BUILD=true as fallback.
• Adds TypeScript moduleResolution: node support coverage.
• Polishes the example app with constructor injection, consumer middleware registration, HTTP middleware/hooks/error handling, shutdown hooks and explicit DI build configuration.
• Removes the README stability section now that this is intentionally a major-impact API change.
• Raises coverage thresholds to 100% for statements, branches, functions and lines.
• Adds Renovate dependency automation, a README dependency automation badge and compatible dependency updates.

Breaking changes

• MessageBus in @haskou/ddd-kernel/contracts/pubsub is now a generic pub/sub contract. Domain-event buses should use DomainMessageBus from @haskou/ddd-kernel/domain.
• Route/controller construction can now be delegated to the kernel DI container through ExpressKernelServer, which changes the recommended route wiring style to constructor injection.
• The Express adapter now exposes explicit registration APIs for controllers, middleware, hooks and error handlers; applications should prefer those over ad-hoc local wrappers.

Documentation

Updated docs cover:

• consumer middleware pipeline, metadata and idempotency store expectations
• message bus publisher hooks and hook error policy
• Express phase hooks, external controller registration, HTTP middleware registration, routingControllersOptions, optional cors peer usage and HttpErrorHandler
• app-specific HTTP error mappings through HttpErrorHandler({ handlers })
• scheduler error policy usage
• dependency injection build configuration through kernel.dependencyInjection({ containerBuild })
• dependency injection overrides for swapping adapters in tests/runtime bootstrap
• external package contract overrides for generated node-dependency-injection references
• TypeScript classic moduleResolution: node compatibility
• Renovate dependency automation and README badges
• README branch/release positioning without the old stability section

Validation

• yarn format:check
• yarn lint
• yarn typecheck
• yarn test
• yarn test:coverage (100% statements, branches, functions and lines)
• yarn docs:build
• yarn --cwd example typecheck
• yarn --cwd example build
• NODE_ENV=development PORT=0 timeout 8 yarn --cwd example start

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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