fix(invitations): remove overly restrictive unique constraint on invitation log entries

app/models/invitation_log_entry.rb

@@ -4,6 +4,4 @@ class InvitationLogEntry < ApplicationRecord
   belongs_to :invitation_log
   belongs_to :member
   belongs_to :invitation, polymorphic: true, optional: true
-
-  validates :member_id, uniqueness: { scope: %i[invitation_type invitation_id] }, allow_nil: true
 end

db/migrate/20260410174346_remove_global_unique_constraint_from_invitation_log_entries.rb

@@ -0,0 +1,13 @@
+class RemoveGlobalUniqueConstraintFromInvitationLogEntries < ActiveRecord::Migration[8.1]
+  def up
+    remove_index :invitation_log_entries,
+                 name: 'idx_on_invitation_type_invitation_id_6d6ef495e6'
+  end
+
+  def down
+    add_index :invitation_log_entries,
+              %i[invitation_type invitation_id],
+              name: 'idx_on_invitation_type_invitation_id_6d6ef495e6',
+              unique: true
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.1].define(version: 2026_04_08_220120) do
+ActiveRecord::Schema[8.1].define(version: 2026_04_10_174346) do
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_catalog.plpgsql"
 
@@ -299,7 +299,6 @@
     t.datetime "updated_at", null: false
     t.index ["invitation_log_id", "status"], name: "index_invitation_log_entries_on_invitation_log_id_and_status"
     t.index ["invitation_log_id"], name: "index_invitation_log_entries_on_invitation_log_id"
-    t.index ["invitation_type", "invitation_id"], name: "idx_on_invitation_type_invitation_id_6d6ef495e6", unique: true
     t.index ["invitation_type", "invitation_id"], name: "index_invitation_log_entries_on_invitation"
     t.index ["member_id", "processed_at"], name: "index_invitation_log_entries_on_member_id_and_processed_at"
     t.index ["member_id"], name: "index_invitation_log_entries_on_member_id"

spec/models/invitation_log_entry_spec.rb

@@ -16,12 +16,4 @@
                                                 })
     end
   end
-
-  describe 'validations' do
-    it 'validates uniqueness of member_id scoped to invitation' do
-      entry = Fabricate(:invitation_log_entry)
-      expect(entry).to validate_uniqueness_of(:member_id)
-        .scoped_to(:invitation_type, :invitation_id)
-    end
-  end
 end