test(auth): anon-auth fixture resets the per-profile token memo as a dict

#107697 (4bdd64b334) reset `_RESOLVE_TOKEN_CACHE` to None, matching the old
single-slot memo. #107611 (173105ce6f, merged the same hour) turned the memo
into a dict keyed by profile home, so `.get()` on None raised AttributeError in
`resolve_nous_access_token` and two anon-auth tests went red on main. Reset to
an empty dict — the memo shape the code now owns.

tests/hermes_cli/test_anon_auth_core.py

@@ -91,10 +91,10 @@ def portal(monkeypatch, tmp_path):
     anon_auth._mint_failed = False
     from hermes_cli import free_tier_bootstrap as _fb
     _fb.reset_for_tests()
-    # resolve_nous_access_token memoises the last token for 5 s across the process; a token minted
+    # resolve_nous_access_token memoises the last token for 5 s per profile home (dict); a token minted
     # by an earlier test must not be served to this one.
     from hermes_cli import auth as auth_mod
-    monkeypatch.setattr(auth_mod, "_RESOLVE_TOKEN_CACHE", None)
+    monkeypatch.setattr(auth_mod, "_RESOLVE_TOKEN_CACHE", {})
     return fake