decrement job completion timers

we don't know what state the game uses to control the decrement, but we
know that it happens once every 11 ticks, independent of the value of
cur_year_tick.

timestream.lua

@@ -139,7 +139,6 @@ local function adjust_unit_counters(unit, timeskip)
     -- not materially affect gameplay
 end
 
--- TODO: for job types that depend on skill, the decrement per tick is <= 1 and depends on unit's skill level
 local function adjust_job_counter(unit, timeskip)
     local job = unit.job.current_job
     if not job then return end
@@ -149,8 +148,13 @@ local function adjust_job_counter(unit, timeskip)
         job_type == df.job_type.CollectSand
     then
         decrement_counter(job, 'completion_timer', timeskip)
-    elseif DEBUG and job.completion_timer > 1 then
-        print(('unhandled job type %s for unit %d'):format(df.job_type[job_type], unit.id))
+    elseif job.completion_timer > 1 then
+        -- for these job types, the decrement per tick is 1/11, but the counter on which
+        -- the decrement happens is unknown. it's not cur_year_tick
+        -- therefore, we decrement probabilistically
+        if math.random(11) <= timeskip then
+            decrement_counter(job, 'completion_timer', 1)
+        end
     end
 end
 
@@ -283,6 +287,7 @@ local function on_tick()
     calendar_timeskip_deficit = math.max(0, desired_calendar_timeskip - calendar_timeskip)
 
     df.global.cur_year_tick = df.global.cur_year_tick + calendar_timeskip
+    df.global.cur_year_tick_advmode = df.global.cur_year_tick_advmode + calendar_timeskip*144
 
     adjust_units(timeskip)
     adjust_activities(timeskip)