Simple premise: If I cast simulacrum on an entity that has a contingency spell cast on it, does that contingency transfer to the simulacrum?
Even if it did, it would end immediately
From my interpretation of game design, it probably shouldn't. But even if it did, the way I read both spells, the effect of contingency would immediately end. The reasoning is as follows.
The Contingency spell requires a specific material component, which is "(A statuette of yourself carved from ivory and decorated with gems worth at least 1,500 gp)". Additionally, the spell has a special ending condition linked to this material:
Also, contingency ends on you if its material component is ever not on your person.
Assuming the contingency would be linked to the simulacrum (not to the original person), it would require another statuette in possession of the simulacrum. However, Simulacrum states:
It appears to be the same as the original, but it has half the creature's hit point maximum and is formed without any equipment.
Although equipment does not refer to all gear, it should be fair to assume that the simulacrum does not create a copy of the 1500 gp statuette (otherwise you could use it to duplicate non-equipment items, which would be awkward). Therefore, as the simulacrum does not possess the required statuette, the contingency spell ends.