SWWAF_MODE (default enforce) takes enforce or observe. In observe mode a
request that SWWAF_DENY_NETS, a ban, the country lists or a rate limit
would refuse is passed to the app, and its log line names that refusal
in would_action. The size and time limits and the 401 still apply. A
broken limit makes no ban; bans read from bans.json are kept but refuse
nothing, and Ledger.Find reads them without counting a refusal in their
notes.
Judgement call: in observe mode a broken limit does not reset the
client's counters, since the reset comes with the ban.
Judgement call: a request a ban would refuse keeps ban_expires.
Model: opus-5-5
