Time-triggered conversation rotation was removed in 1d5d059410 and core
has read nothing under session_reset since. Nothing told users whose
config still asked for it: their gateway conversations silently stopped
resetting, and a household that never types /new pays for an
ever-growing context.
Gateway startup (for every served profile) and `hermes doctor` now
report a session_reset block whose mode is idle, daily or both, and
point at the hermes-session-reset-policy catalog plugin, which reads
the same top-level block unchanged. The notice stays quiet while that
plugin is enabled. The config key is reported, never rewritten, since
the plugin consumes it. The gateway: form the old loader also accepted
is detected too, with a hint to move it to the top level.