extract_new_password had markers for 'is:', 'changed to:', 'reset to:',
'set to:' etc. but none match tuwunel's actual reset-password reply:
Successfully reset password for @user:server to: <password>
Here the verb ('reset') is not adjacent to 'to:', so every marker missed
and the function returned None for every polled event. The admin-room poll
then ran its full 15s loop without a match and the auto-recovery timed out
on every agent — even though the bot replied correctly and the backward
poll found the message. This is why matrix password auto-recovery kept
looping despite the poll-strategy fix.
Add a generic ' to: ' marker (with surrounding spaces) placed after the
specific verb markers and before the bare 'password:' last resort. Matrix
user ids and server names can't contain ' to: ', so it only ever anchors
on the prose delimiter. Two regression tests cover the exact production
wording.