I have a couple of questions for you:
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Do you know how much water level there is between the bottom and top of the water level when static? You mentioned silt. Is your pump set at the bottom of the bore? If so, can it be raised about three feet from the bottom to avoid stirring up silt. I am assuming you have casing to the bottom.
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If you have a well controller at the surface, does it have a port to add a water level sensor that is suspended above the pump inlet but below the static water surface? If yes, I would add one to turn the pump off before the well is sucking air.
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If you did the above can you add an electronic pressure sensor that IFTTT can use as an I put to pause or stop a Rachio run.
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Do you have a pressure tank in your well or can you add one that can be connected to your sprinkler system and rigged to “talk” to the controller?
You might also look at this thread. Low Water Pressure Cutoff