feat: removes phoen number as member field and makes name optional

lib/membership/member.ex

@@ -5,7 +5,7 @@ defmodule Mv.Membership.Member do
   ## Overview
   Members are the core entity in the membership management system. Each member
   can have:
-  - Personal information (name, email, phone, address)
+  - Personal information (name, email, address)
   - Optional link to a User account (1:1 relationship)
   - Dynamic custom field values via CustomField system
   - Full-text searchable profile
@@ -20,9 +20,8 @@ defmodule Mv.Membership.Member do
   - `has_one :user` - Optional authentication account link
 
   ## Validations
-  - Required: first_name, last_name, email
+  - Required: email (all other fields are optional)
   - Email format validation (using EctoCommons.EmailValidator)
-  - Phone number format: international format with 6-20 digits
   - Postal code format: exactly 5 digits (German format)
   - Date validations: join_date not in future, exit_date after join_date
   - Email uniqueness: prevents conflicts with unlinked users
@@ -31,7 +30,7 @@ defmodule Mv.Membership.Member do
   Members have a `search_vector` attribute (tsvector) that is automatically
   updated via database trigger. Search includes name, email, notes, contact fields,
   and all custom field values. Custom field values are automatically included in
-  the search vector with weight 'C' (same as phone_number, city, etc.).
+  the search vector with weight 'C' (same as city, etc.).
   """
   use Ash.Resource,
     domain: Mv.Membership,
@@ -343,9 +342,7 @@ defmodule Mv.Membership.Member do
   validations do
     # Required fields are covered by allow_nil? false
 
-    # First name and last name must not be empty
-    validate present(:first_name)
-    validate present(:last_name)
+    # Email is required
     validate present(:email)
 
     # Email uniqueness check for all actions that change the email attribute
@@ -396,11 +393,6 @@ defmodule Mv.Membership.Member do
       where: [present([:join_date, :exit_date])],
       message: "cannot be before join date"
 
-    # Phone number format (only if set)
-    validate match(:phone_number, ~r/^\+?[0-9\- ]{6,20}$/),
-      where: [present(:phone_number)],
-      message: "is not a valid phone number"
-
     # Postal code format (only if set)
     validate match(:postal_code, ~r/^\d{5}$/),
       where: [present(:postal_code)],
@@ -453,12 +445,12 @@ defmodule Mv.Membership.Member do
     uuid_v7_primary_key :id
 
     attribute :first_name, :string do
-      allow_nil? false
+      allow_nil? true
       constraints min_length: 1
     end
 
     attribute :last_name, :string do
-      allow_nil? false
+      allow_nil? true
       constraints min_length: 1
     end
 
@@ -474,10 +466,6 @@ defmodule Mv.Membership.Member do
       constraints min_length: 5, max_length: 254
     end
 
-    attribute :phone_number, :string do
-      allow_nil? true
-    end
-
     attribute :join_date, :date do
       allow_nil? true
     end
@@ -1073,7 +1061,6 @@ defmodule Mv.Membership.Member do
     expr(
       contains(postal_code, ^query) or
         contains(house_number, ^query) or
-        contains(phone_number, ^query) or
         contains(email, ^query) or
         contains(city, ^query)
     )