Bootstrap self-wiring: auto-register framework services

[young-steveo]

Summary

• Container self-registration — Container::__construct() now registers the container instance under both Application and ContainerInterface automatically. No more manual step in bootstrap files.
• Kernel pre-bootstrap wiring — Both HyperKernel and RuneKernel auto-register Bus (deferred factory reading app.debug) and EventDispatcherInterface (Echo Dispatcher) with has() guards so apps can override before or after bootstrap.
• HyperKernel HTTP services — ServerAdapter, Server, and EmptyResponseRenderer auto-registered with has() guards.
• From-scratch integration test — 3 tests verifying minimal bootstrap produces a working container with all framework services resolvable, plus a test confirming the has() guard lets apps override Bus before bootstrap.
• COMPENDIUM.md — New "What the framework auto-registers" section documenting container, bus, event dispatcher, and HTTP services with their override points.
• HyperKernelTest cleanup — Converted willReturnMap calls to willReturnCallback with default false, making tests resilient to new has() calls in bootstrap.

Test plan

• composer check passes (cs-fix, cs-check, phpstan level 9, phpunit — 2836 tests, 5723 assertions)
• New BootstrapSelfWiringTest covers HyperKernel, RuneKernel, and Bus override scenarios
• All existing HyperKernel and RuneKernel tests pass with the new bootstrap wiring
• Container self-registration tests added to ContainerTest

🤖 Generated with Claude Code