fix: Update DB and backend endpoints for help request form

[AlperKartkaya]

Fixes #184

With the changes to be applied, the backend should provide the necessary endpoints for the simple help request form below:

Noting that the formatting for the phone number is different than the format the frontend team suggested.

{
  "helpTypes": ["first_aid", "fire_brigade"],
  "otherHelpText": "",
  "affectedPeopleCount": 3,
  "riskFlags": ["fire", "electric_hazard"],
  "vulnerableGroups": ["children", "pregnant"],
  "description": "Apartment entrance blocked, one person bleeding.",
  "bloodType": "A+",
  "location": {
    "country": "turkiye",
    "city": "istanbul",
    "district": "besiktas",
    "neighborhood": "levazim",
    "extraAddress": "Bina B, 3. kat, arka giris"
  },
  "contact": {
    "fullName": "Ayse Yilmaz",
    "phone": "5053217788",
    "alternativePhone": "5053217788"
  },
  "consentGiven": true
}

[mehmetcangurbuz08]

Looks solid. Merging.