[codex] validate phone contact methods

[doobneek]

Summary

• normalize saved phone numbers to digits only while accepting common punctuation and a leading US country code
• allow short 3-10 digit phone/SMS/fax numbers, including emergency and text short codes
• require WhatsApp numbers to be full 10-digit US numbers and reject extensions on SMS, WhatsApp, and fax contacts
• add focused phone utility tests and let unit-only test runs skip the DB integration setup

Validation

• npx eslint src/utils/phones.js src/controllers/locations.js test/unit/phones.test.js test/setup.js
• npx jest test/unit/phones.test.js --runInBand
• npm run build

Note: the normal pre-commit hook runs full-repo lint, which still fails on existing CRLF line-ending issues outside this patch. Touched-file lint passes.

Part of the phone contact-method work alongside streetlives/yourpeer.nyc#579.