feat(dependency-injection): lifecycle — PreDestroy, custom scopes, scope violation detection

[deer]

• @PreDestroy — Context now implements AutoCloseable; close() invokes @PreDestroy-annotated zero-arg methods on all instantiated singletons in reverse topological order (dependents destroyed before their dependencies), derived via Graphs.topologicalSort
• Custom scopes — Scope / ScopeAnnotation / ScopedValueScope: a @FunctionalInterface scope API backed by ScopedValue (virtual-thread safe, leak-free); register via InjectionFramework#bindScope
• Scope violation detection fix — validate() now also flags @Singleton depending on a custom-scoped binding (previously only caught singleton → prototype); names the scope annotation in the error message (e.g. depends on @RequestScoped-scoped [...])
• findScopeEntry — refactors findScope to expose the full (annotationClass, Scope) entry, enabling CustomScopedClassBinding to carry the scope annotation for introspection