Wiring 4-wire PT1000 to MCP3008
Temperature dependent resistor based temperature sensors need a circuit which feeds known current through them to generate a temperature dependent voltage. In your own recently inserted example drawing there's a voltage divider. It's non-linear, but that's nothing if you calculate the result with software and the AD conversion resolution is high enough. The numeric conversion result is proportional to Rx/(Rx+R2) where Rx is the resistance of the sensor. The idea has a benefit - no absolute Vref is needed, it's enough the +5V doesn't swing during the conversion (filter R1+C1 is hoped to kill fast changes).
Sensors have often 4 wires because the current feeding wires also have some resistance and the voltage sensing circuit wants to know what's the voltage between the ends of the resistor, the voltage drop in the current feeding wires is not wanted to be summed along.
Then you need a circuit which converts the voltage of the sensor to temperature. Your AD coverter + your program can do the trick. Or not.  Get the resistance vs temperature curve for PT1000, calculate which current through PT1000 can cause a measurable voltage and does the interesting temperature range cause large enough variation to the voltage. You may need an analog circuit which subtracts some base line voltage and amplifies the rest of the voltage to give enough variation in the interesting temperature range.
Know that the dependence resistance vs temperature is not linear, you need a lookup table or nonlinearity approximation functions. You must compensate how much measurement current heats the sensor element and you must be able to filter out the noise. A simple RC filter+software averaging are enough in easy cases. Finally you need a a known well working temperature meter for calibration. Theoretically melting ice and boiling water can be used if the air pressure is known.
The task as a whole is far from trivial. Consider to use something which contains the tricky parts already designed and built. One example: https://www.digikey.dk/catalog/en/partgroup/adafruit-pt1000-rtd-temperature-sensor-amplifier-max31865/77266