feat: Archivum skeleton — Go/GraphQL backend + Vue 3 PWA frontend

Full project scaffold: multi-stage Dockerfile (ARM64/AMD64), AsciiDoc↔TipTap
bridge, Setup Wizard, CodeMirror source editor, Git-backed storage layer,
LDAP+JWT auth skeleton, Tailwind mobile-first layout, and VS Code build/push
tasks targeting registry at 192.168.0.19:5000.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/internal/graph/resolver.go

@@ -0,0 +1,16 @@
+package graph
+
+// Resolver is the root resolver — all query/mutation methods live here.
+// Fields are populated by NewServer via dependency injection.
+type Resolver struct {
+	cfg     interface{} // *config.Config  — placeholder until gqlgen generation
+	auth    interface{} // *auth.Manager
+	storage interface{} // *storage.Store
+	git     interface{} // *git.Repo
+}
+
+// TODO: Run `go generate ./...` after adding gqlgen to go.mod to generate
+// the type-safe resolver stubs from schema.graphql.
+//
+// The generated code lands in graph/generated.go (gitignored for now).
+// Implement each method on *Resolver once the stubs exist.