Add emergency contact address to patient connectathon form

[mlaletina95]

Ref: #47

Summary

• Add contact-address group under contact-group (Emergency Contact) in patient-create-connectathon questionnaire — same PH Core address fields as patient address-group (use, line, region, province, city/municipality, barangay, city, district, postal code, country), with itemPopulationContext: %context.address
• Extend patient-create-extract-connectathon mapper to persist Patient.contact.address on $extract
• Use readable contact-address-* linkIds (instead of FCE-generated ids from Aidbox UI export)

Test plan

• Reload seeds in Aidbox (watch-seeds or DB rebuild)
• Open patient form — Emergency Contact section shows Address fields
• $populate patient with contact.address — address fields prefilled (line, city, postal, PSGC extensions)
• $extract round-trip — Patient.contact[0].address saved correctly
• Create new patient with emergency contact + address via form UI