[StevenTCramer]

Summary

Anonymous-type handler results now build and print through ToString().

• source/timewarp-nuru-analyzers/generators/models/result-value-kind.cs: new ResultValueKind.Anonymous,
  set by ResultValueKinds.Of when the symbol is or contains an anonymous type (type argument, array
  element, containing type; semantic check via ITypeSymbol.IsAnonymousType). CanBeNull keeps the null
  guard for it.
• handler-extractor.method-symbols.cs: one ValueReturnType helper for method symbols and inferred lambda
  returns. An anonymous result's type name becomes global::System.Object (Task when async), so the
  local function, the result local and the __invocation.Result cast all compile (object accepts the value).
• handler-invoker-emitter.output.cs: GetOutputStrategy returns Raw for Anonymous (ToString(), no JSON
  try/catch); capabilities describe the return as System.Object, kind Primitive (same strategy call).
• GenerateNuruJsonContextTask.Extraction.cs: GetReturnTypeName returns null for Anonymous, so no
  [JsonSerializable] is written for it (the root cause of the reported CS1001/CS1525 cascade).
• documentation/user/features/output-handling.md: the note now says new { ... } builds and prints via
  ToString(); return a named record or class for JSON.
• Test: tests/timewarp-nuru-tests/routing/routing-40-anonymous-type-results.cs (runs in the CI multi-mode
  assembly, which also runs the JSON context MSBuild task): sync query, async block body, List<anon>,
  command, and a null anonymous result.

Known limits: a List<anon> prints its CLR type name (List1[...]), as ToString()` does; JSON output still
needs a named type.

Gates

• ./bin/dev build — pass (Build completed successfully).
• ./bin/dev test — pass (runfile cache cleared first; 4705 tests passed, 0 failed, standalone phase 0 failed;
  routing-40 5/5).
• ganda repo audit — pass after ganda repo audit --fix for the advisory vscode-window-icon warning
  (git-ignored file only); rerun: "Repository passes all audit checks." The commit-hook attest then failed
  runfile-executable (routing-40 lacked the executable bit); set it, and ganda repo audit passes again.

Test plan

Smoke:

ganda runfile cache --clear
(cd tests/timewarp-nuru-tests/routing && dotnet run routing-40-anonymous-type-results.cs)

Expect: the file builds (no CS1001/CS1525 from NuruUserTypesJsonContext.g.cs or NuruGenerated.g.cs), and
all 5 tests pass; atr-info prints { Name = MyApp, Version = 1.0.0 }, atr-async 2 prints { Count = 2 },
atr-cmd prints { Ok = True }, and atr-none prints nothing.

Kanban task 585
Session: 1411579