_send_session_db_warning_notifications() broadcast the error recorded at startup
without asking whether it was still true. A startup `database is locked` routinely
clears while the adapters are still connecting (another profile's open, a `hermes
sessions` one-shot, a slow SMB lock release), so the home channels were told the
store was unavailable when it had already healed — and a warning that is wrong once
is ignored the next time it is right.
The RecoverableHandleCache opener already clears `_session_db_init_error` on
recovery; the broadcast now drives one open attempt through it first and only warns
when the error is still standing. A store that is genuinely still down warns exactly
as before.
Fixes#108031.
9f9ec647f5