Disassembling all 25 timer triggers in threshold order turns the phase into
readable script: fade, BGM, then squadron deployments at 30/60/90/120/170/210/
240s each as deploy + move_order + objective_marker, with radio messages
interleaved and a late block at 1020-1170s.
Answers the open question from the previous entry: timer 0 is armed by
timer_set(1200, 180) followed by timer_resume, fired at 4.0s on the phase-intro
clock (timer 5), which is already running when the phase begins. So the mission
clock has a 1200-second limit.
And it independently confirms the arrival measurement: the timer0 @ 170.0s
trigger deploys symbol index 0x01 = ADN110, the first of the three squadrons the
phase-1 condition polls. The live run measured those three going active at
~155-165s of mission time, and the route table also says 170. Three independent
sources agree -- the route table, the trigger table, and the running game.
Open: whether a coroutine can re-arm its own trigger, and timer_set's second
argument (180), for which 'warning threshold' is a guess rather than a finding.
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