feat: the kernel declares every event it dispatches to the dispatcher

[rodrigoteamx]

What

milpa/runtime now declares the five events it dispatches — architecture.resolved, capability.resolved, plugin.booting, plugin.booted, kernel.booted — to the dispatcher, at the moment Kernel::boot() holds it and before any dispatch.

• Milpa\Runtime\Event\RuntimeEvents — one declarations holder for the package. It owns the event names as constants and returns one EventDeclaration per event from declarations(): the dispatching class, one sentence on the moment it fires, the payload key (event) and the class of the subject, and interceptable: true on plugin.booting alone — the only payload that carries an InterceptionSlot.
• The dispatch sites use the same constants. Kernel::boot() and InlinePluginBootStrategy no longer hand literals to dispatch(); a declaration and its dispatch cannot drift apart through a retyped string.
• Declaring is a silent no-op for a dispatcher that cannot take it (instanceof DeclaredEvents), and dispatching an undeclared name keeps working: declaring is not enforced, it is counted.
• milpa/core floor raised to >=0.11 <1.0 (where DeclaredEvents / EventDeclaration live). The locked siblings capped core at ^0.8, so milpa/container 0.2.0→0.2.1, milpa/events 0.3.0→0.4.0, milpa/resolver 0.7.0→0.7.1 and (dev) milpa/plugin 0.12.2→0.13.1 moved with it.

Why

Greenhouse decisions/0228, «los eventos se declaran al despachador y la casa los cuenta»: the authority on what events exist is the emitter, and the one place every dispatch passes through is the dispatcher. So each package declares its events in the same package, next to its dispatch() sites, built from the same constants those dispatches use — and the house asks the dispatcher what exists and what was dispatched undeclared, instead of grepping source.

Falsifier

tests/TheKernelDeclaresEveryEventItDispatchesTest.php drives the real boot path with a spy dispatcher implementing both MilpaEventDispatcherInterface and DeclaredEvents, and asserts:

• every name the spy saw dispatched was declared, and declare() ran before the first dispatch();
• the declared set is exactly the five expected names, in boot order;
• each declaration's subjectKey/subjectType/interceptable match the payload that dispatch really carried;
• end to end on milpa/events' own dispatcher: dispatched() minus declared() is empty;
• control: the same boot on a plain dispatcher that does not implement DeclaredEvents runs unchanged and dispatches the same five names.

Mutation proof: deleting the kernel.booted declaration from declarations() turned 3 of the 5 tests red; restored, green again.

Gates

composer validate --strict valid · php-cs-fixer 0 of 80 · PHPStan [OK] · docblock gate OK · attribution OK · PHPUnit 104 tests, 308 assertions green · line coverage 92.66% (floor 89).