feat(impact): cross-language blast-radius coverage (22 languages + 14 frameworks) (#708)

Completes the cross-file dependency graph behind impact / affected / explore across all 22 supported languages and 14 web frameworks, validated on real-world repos (measured fair-coverage table added to the README). Per-language resolution + framework resolvers/synthesizers (Lua/Luau require, Shopify OS 2.0 Liquid sections, Delphi forms, Rust cross-module + Rocket macros, Swift Fluent, SvelteKit/Nuxt loader/component conventions, RN/Expo bridges). 0 cross-family false edges, full suite green (1187 passed). See #708.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/extraction/languages/java.ts

@@ -6,7 +6,11 @@ export const javaExtractor: LanguageExtractor = {
   functionTypes: [],
   classTypes: ['class_declaration'],
   methodTypes: ['method_declaration', 'constructor_declaration'],
-  interfaceTypes: ['interface_declaration'],
+  // `annotation_type_declaration` is `@interface Foo { … }` — an annotation
+  // definition. Without it, annotation types (`@SerializedName`, `@GetMapping`,
+  // JPA/Spring annotations) aren't nodes, so the `@Foo` usages that DO get
+  // extracted can't resolve and the annotation file shows zero dependents.
+  interfaceTypes: ['interface_declaration', 'annotation_type_declaration'],
   structTypes: [],
   enumTypes: ['enum_declaration'],
   enumMemberTypes: ['enum_constant'],