null debounce_delay_s if 0 (#7013)

Signed-off-by: pyranota <pyra@duck.com>

backend/migrations/20251030161900_nullify_debounce_delay.down.sql

@@ -0,0 +1 @@
+-- Add down migration script here

backend/migrations/20251030161900_nullify_debounce_delay.up.sql

@@ -0,0 +1,4 @@
+-- Add up migration script here
+UPDATE script 
+SET debounce_delay_s = NULL 
+WHERE debounce_delay_s = 0;