Update precision description in schema and README

Clarified precision rules in both full schema and README file by adding a note about inclusion of zeroes in minimum and maximum precision calculations. This will ensure the users understand this particular aspect when dealing with precision logic.

README.md

@@ -328,8 +328,8 @@ columns:
       min: 10                           # Can be integer or float, negative and positive
       max: 100.50                       # Can be integer or float, negative and positive
       precision: 3                      # Strict(!) number of digits after the decimal point
-      min_precision: 2                  # Min number of digits after the decimal point
-      max_precision: 4                  # Max number of digits after the decimal point
+      min_precision: 2                  # Min number of digits after the decimal point (with zeros)
+      max_precision: 4                  # Max number of digits after the decimal point (with zeros)
 
       # Dates
       date_format: Y-m-d                # See: https://www.php.net/manual/en/datetime.format.php

schema-examples/full.yml

@@ -52,8 +52,8 @@ columns:
       min: 10                           # Can be integer or float, negative and positive
       max: 100.50                       # Can be integer or float, negative and positive
       precision: 3                      # Strict(!) number of digits after the decimal point
-      min_precision: 2                  # Min number of digits after the decimal point
-      max_precision: 4                  # Max number of digits after the decimal point
+      min_precision: 2                  # Min number of digits after the decimal point (with zeros)
+      max_precision: 4                  # Max number of digits after the decimal point (with zeros)
 
       # Dates
       date_format: Y-m-d                # See: https://www.php.net/manual/en/datetime.format.php