Follow-ups on the salvaged unknown-root-key warning from PR #67345:
- Add image_gen, video_gen, plugins, smart_model_routing, platform_toolsets,
session_reset, multiplex_profiles, profile_routes, platforms,
require_mention, unauthorized_dm_behavior, and signal to
_EXTRA_KNOWN_ROOT_KEYS — all are read from the raw user YAML (gateway,
registries, plugin CLI) or written by our own setup wizard, but absent
from DEFAULT_CONFIG. Without this, doctor would warn on configs Hermes
itself wrote.
- Convert tests/hermes_cli/test_config_validation.py back to LF line
endings (the PR's rewrite introduced CRLF).
