refactor(auth): factory-style use cases + controllers + real Payload impls

- Use cases (sign-in, sign-up, sign-out) → factory functions with I*UseCase aliases
- Controllers → factory functions with I*Controller aliases
- DI symbols + module updated with .toDynamicValue() bindings for factories
- New: real UsersRepository (Payload-backed, SanitizedConfig, contract-tested)
- New: real AuthenticationService (node:crypto hashing/UUIDs; createSession/
  validateSession/invalidateSession deferred — see refactor log §7)
- bindProductionAuth swaps both mocks for real impls (was a no-op before)
- Tests refactored to construct mocks and inject directly (no container rebinding)
- Feature test constructs full chain via direct factory injection

Refactor log: §2, §4.1, §4.2, §5.1, §5.2, §6.1, §7
Spec: §6.1, §7

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

packages/auth/src/interface-adapters/controllers/sign-out.controller.ts

@@ -1,13 +1,15 @@
 import { InputParseError } from "../../entities/errors/common";
 import type { Cookie } from "../../entities/models/cookie";
-import { signOutUseCase } from "../../application/use-cases/sign-out.use-case";
+import type { ISignOutUseCase } from "../../application/use-cases/sign-out.use-case";
 
-export async function signOutController(
-  sessionId: string | undefined,
-): Promise<Cookie> {
-  if (!sessionId) {
-    throw new InputParseError("Must provide a session ID");
-  }
-  const { blankCookie } = await signOutUseCase(sessionId);
-  return blankCookie;
-}
+export type ISignOutController = ReturnType<typeof signOutController>;
+
+export const signOutController =
+  (signOutUseCase: ISignOutUseCase) =>
+  async (sessionId: string | undefined): Promise<Cookie> => {
+    if (!sessionId) {
+      throw new InputParseError("Must provide a session ID");
+    }
+    const { blankCookie } = await signOutUseCase(sessionId);
+    return blankCookie;
+  };