New phase devtesting (aliases franken/fake-franken) probes
taler-devtesting on rusty.taler-ops.ch: geniban + fake-incoming CHF
to the exchange IBAN. Nexus bounce without reserve pub is OK for the
plumbing probe. Stage host-agent can include the phase.
GOA monpages checks the full suite catalog (bank/exchange/taler
/monitoring/ plus surface/aptdeploy/mattermost/mail) and on-disk
discovery; FP only its own mon hosts. Default MONPAGES_REQUIRE_PUBLIC=1.
Also fix with_timeout re-running failed phases via || fallback.
