fix(contacts): truncate inbound contact names (IMAP sender display names) (#14631)

## Description

Truncates long contact names in `ContactInboxWithContactBuilder` before
persisting them, so inbound IMAP sender display names over the
`contacts.name` 255-character limit no longer raise
`ActiveRecord::RecordInvalid` from `Inboxes::FetchImapEmailsJob`. This
keeps email ingestion moving while preserving the existing contact name
length constraint.

Linear ticket:
[https://linear.app/chatwoot/issue/CW-7263/sentry-active-record-invalid-contact-create-from-imap-fetch-job](https://linear.app/chatwoot/issue/CW-7263/sentry-active-record-invalid-contact-create-from-imap-fetch-job)

## Type of change

- [x] Bug fix (non-breaking change which fixes an issue)

## How Has This Been Tested?

- [x] `bundle exec rspec
spec/builders/contact_inbox_with_contact_builder_spec.rb`
- [x] `bundle exec rspec spec/mailboxes/imap/imap_mailbox_spec.rb`
- [x] `bundle exec rubocop
app/builders/contact_inbox_with_contact_builder.rb
spec/builders/contact_inbox_with_contact_builder_spec.rb`

## Checklist:

- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes

app/builders/contact_inbox_with_contact_builder.rb

@@ -50,7 +50,7 @@ class ContactInboxWithContactBuilder
 
   def create_contact
     account.contacts.create!(
-      name: contact_attributes[:name] || ::Haikunator.haikunate(1000),
+      name: contact_name,
       phone_number: contact_attributes[:phone_number],
       email: contact_attributes[:email],
       identifier: contact_attributes[:identifier],
@@ -59,6 +59,11 @@ class ContactInboxWithContactBuilder
     )
   end
 
+  def contact_name
+    name = contact_attributes[:name] || ::Haikunator.haikunate(1000)
+    name.truncate(ApplicationRecord::MAX_STRING_COLUMN_LENGTH, omission: '')
+  end
+
   def find_contact
     contact = find_contact_by_identifier(contact_attributes[:identifier])
     contact ||= find_contact_by_email(contact_attributes[:email])

app/models/application_record.rb

@@ -1,4 +1,7 @@
 class ApplicationRecord < ActiveRecord::Base
+  MAX_STRING_COLUMN_LENGTH = 255
+  MAX_TEXT_COLUMN_LENGTH = 20_000
+
   include Events::Types
   self.abstract_class = true
 
@@ -37,7 +40,7 @@ class ApplicationRecord < ActiveRecord::Base
   end
 
   def validate_content_length(column)
-    max_length = column.type == :text ? 20_000 : 255
+    max_length = column.type == :text ? MAX_TEXT_COLUMN_LENGTH : MAX_STRING_COLUMN_LENGTH
     return if self[column.name].nil? || self[column.name].length <= max_length
 
     errors.add(column.name.to_sym, "is too long (maximum is #{max_length} characters)")

spec/builders/contact_inbox_with_contact_builder_spec.rb

@@ -39,6 +39,21 @@ describe ContactInboxWithContactBuilder do
       expect(contact_inbox.inbox_id).to eq(inbox.id)
     end
 
+    it 'truncates long contact names before creating the contact' do
+      long_name = 'a' * 300
+
+      contact_inbox = described_class.new(
+        source_id: '123456',
+        inbox: inbox,
+        contact_attributes: {
+          name: long_name,
+          email: 'testemail@example.com'
+        }
+      ).perform
+
+      expect(contact_inbox.contact.name).to eq(long_name.first(ApplicationRecord::MAX_STRING_COLUMN_LENGTH))
+    end
+
     it 'doesnot create contact if it already exist with identifier' do
       contact_inbox = described_class.new(
         source_id: '123456',