fix: Creates contact when Instagram returns No matching Instagram user (#11496)

# Creates contact when Instagram returns `No matching Instagram user`

## Description

The error occurs when Facebook tries to validate the Facebook App
created to authorize Instagram integration.
The Facebook's agent uses a Bot to make tests on the App where is not a
valid user via API, returning `{"error"=>{"message"=>"No matching
Instagram user", "type"=>"IGApiException", "code"=>9010}}`.
Then Facebook rejects the request saying this app is still not ready
once the integration with Instagram didn't work.
We can safely create an unknown contact, making this integration work.

## Type of change

Please delete options that are not relevant.

- [X] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality not to work as expected)
- [ ] This change requires a documentation update

## How Has This Been Tested?

There's automated test to cover.

## Checklist:

- [X] My code follows the style guidelines of this project
- [X] I have performed a self-review of my code
- [X] I have commented on my code, particularly in hard-to-understand
areas
- [ ] I have made corresponding changes to the documentation
- [ ] 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
- [ ] Any dependent changes have been merged and published in downstream
modules

---------

Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

spec/jobs/webhooks/instagram_events_job_spec.rb

@@ -279,11 +279,29 @@ describe Webhooks::InstagramEventsJob do
         expect(instagram_inbox.messages.count).to be 0
       end
 
-      it 'handle messaging_seen callback' do
+      it 'handles messaging_seen callback' do
         expect(Instagram::ReadStatusService).to receive(:new).with(params: message_events[:messaging_seen][:entry][0][:messaging][0],
                                                                    channel: instagram_inbox.channel).and_call_original
         instagram_webhook.perform_now(message_events[:messaging_seen][:entry])
       end
+
+      it 'creates contact when Instagram API call returns `No matching Instagram user` (9010 error code)' do
+        stub_request(:get, %r{https://graph\.instagram\.com/v22\.0/.*\?.*})
+          .to_return(status: 401, body: { error: { message: 'No matching Instagram user', code: 9010 } }.to_json)
+
+        instagram_webhook.perform_now(message_events[:dm][:entry])
+
+        instagram_inbox.reload
+
+        expect(instagram_inbox.contacts.count).to be 1
+        expect(instagram_inbox.contacts.last.name).to eq 'Unknown (IG: Sender-id-1)'
+        expect(instagram_inbox.contacts.last.contact_inboxes.count).to be 1
+        expect(instagram_inbox.contacts.last.contact_inboxes.first.source_id).to eq 'Sender-id-1'
+
+        expect(instagram_inbox.conversations.count).to eq 1
+        expect(instagram_inbox.messages.count).to eq 1
+        expect(instagram_inbox.messages.last.content_attributes['is_unsupported']).to be_nil
+      end
     end
   end
 end