GET /contacts?company_id={uuid}

[
  {
    "id": "550e8400-e29b-41d4-a716-446655440000",
    "company_id": "7b3f1c2d-4e5a-6f7b-8c9d-0e1f2a3b4c5d",
    "first_name": "John",
    "last_name": "Doe",
    "email": "john@acme.com",
    "phone": "+91-9876543210",
    "designation": "Sales Manager",
    "is_primary": true,
    "created_at": "2024-01-15T10:30:00Z",
    "updated_at": "2024-01-15T10:30:00Z"
  }
]

GET /contacts/{contact_id}

{
  "id": "550e8400-e29b-41d4-a716-446655440000",
  "company_id": "7b3f1c2d-4e5a-6f7b-8c9d-0e1f2a3b4c5d",
  "first_name": "John",
  "last_name": "Doe",
  "email": "john@acme.com",
  "phone": "+91-9876543210",
  "designation": "Sales Manager",
  "is_primary": true,
  "created_at": "2024-01-15T10:30:00Z",
  "updated_at": "2024-01-15T10:30:00Z"
}

POST /contacts

{
  "company_id": "7b3f1c2d-4e5a-6f7b-8c9d-0e1f2a3b4c5d",
  "first_name": "John",
  "last_name": "Doe",
  "email": "john@acme.com",
  "phone": "+91-9876543210",
  "designation": "Sales Manager",
  "is_primary": false
}

PATCH /contacts/{contact_id}

{
  "designation": "Head of Sales",
  "is_primary": true
}

DELETE /contacts/{contact_id}