sanitize numbers

[osabahat]

Handles the following cases:

# Standard US numbers
("223-456-7890", "2234567890"),
("(223) 456-7890", "2234567890"),
("223 456 7890", "2234567890"),
("2234567890", "2234567890"),
# US numbers with country code
("+1 (223) 456-7890", "2234567890"),
("1-223-456-7890", "2234567890"),
("1-223-456-7890", "2234567890"),
("+12234567890", "2234567890"),
# Invalid cases
("12345", None),  # Too short
("abcdefg", None),  # Non-numeric
("", None),  # Empty input

Any phone numbers > 10 digits we just take the last 10 digits of the number to use