fix(whatsapp): truncate location fallback_title to 255 chars to avoid silent message drop (#14517)

## Summary

`Whatsapp::IncomingMessageBaseService#attach_location` builds a
`fallback_title` by concatenating `location['name']` and
`location['address']` with no length cap, then stores it directly into
`Attachment#fallback_title`. `ApplicationRecord` enforces a generic
255-character limit on string columns, so any WhatsApp location whose
`"#{name}, #{address}"` exceeds 255 chars (a common case for Google
Places that include a long full address) raises
`ActiveRecord::RecordInvalid` deep inside the Sidekiq job. The message
and attachment INSERTs are part of the same transaction, so the whole
thing rolls back. Sidekiq retries once; the retry dedup-skips the wamid
silently and exits without an error. **Result: the message is
irrecoverably lost — no row in `messages`, no entry in the UI, no
outgoing webhook, no clue for the operator.**

Confirmed in `v4.13.0`, `v4.14.0`, and `develop` (commit `f33e469`,
2026-05-20). No upstream issue found before opening this PR.

## How to reproduce

1. From WhatsApp, share a Google Place whose `name + ", " + address` is
> 255 chars. The Spanish business address `Gremi de Fusters, 33,
Edificio VIP Asima, Piso 2, Local 2, Norte, 07009 Polígon industrial de
Son Castelló, Illes Balears, España` (132 chars) used as both `name` and
`address` is enough.
2. Sidekiq logs:
   ```
   ERROR ActiveRecord::RecordInvalid: Validation failed:
   Attachments fallback title is too long (maximum is 255 characters)
   ```
3. The `messages` table has no row. The conversation UI shows nothing
for that timestamp.
4. The first retry "Performed" successfully but creates nothing — the
dedup-by-source-id silently swallows the failure.

## Fix

Cap the existing concatenated title at 255 chars via `.first(255)`.
Minimal change, no behavioural difference for any message shorter than
the limit, prevents the silent data loss for any longer ones.

```diff
-    location_name = location['name'] ? "#{location['name']}, #{location['address']}" : ''
+    location_name = (location['name'] ? "#{location['name']}, #{location['address']}" : '').first(255)
```

## Alternatives considered

- **Increase the validation limit on `Attachment#fallback_title`**: more
invasive; would touch other inbound channels and possibly require a DB
column change.
- **Use `name` alone (no concat)**: cleaner semantically (in many real
payloads `name == address`), but changes user-visible behaviour. Left as
a follow-up if desired.
- **Truncate with ellipsis**: cosmetic only; deferred.

This PR is intentionally minimal so it can be merged on its own.

---------

Co-authored-by: Sony Mathew <sony@chatwoot.com>
Co-authored-by: Sony Mathew <2040199+sony-mathew@users.noreply.github.com>

app/services/whatsapp/incoming_message_base_service.rb

@@ -147,7 +147,7 @@ class Whatsapp::IncomingMessageBaseService
 
   def attach_location
     location = messages_data.first['location']
-    location_name = location['name'] ? "#{location['name']}, #{location['address']}" : ''
+    location_name = (location['name'] ? "#{location['name']}, #{location['address']}" : '').first(255)
     @message.attachments.new(
       account_id: @message.account_id,
       file_type: file_content_type(message_type),

spec/services/whatsapp/incoming_message_service_spec.rb

@@ -381,6 +381,32 @@ describe Whatsapp::IncomingMessageService do
         expect(location_attachment.coordinates_long).to eq(-122.3895553)
         expect(location_attachment.external_url).to eq('http://location_url.test')
       end
+
+      it 'truncates long fallback titles to avoid dropping location messages' do
+        long_place_name = [
+          'Gremi de Fusters, 33, Edificio VIP Asima, Piso 2, Local 2, Norte',
+          '07009 Poligon industrial de Son Castello, Illes Balears, Espana'
+        ].join(', ')
+        source_id = 'wamid.long-location-fallback-title'
+        params = {
+          'contacts' => [{ 'profile' => { 'name' => 'Sojan Jose' }, 'wa_id' => '2423423243' }],
+          'messages' => [{ 'from' => '2423423243', 'id' => source_id,
+                           'location' => { 'id' => 'b1c68f38-8734-4ad3-b4a1-ef0c10d683',
+                                           :address => long_place_name,
+                                           :latitude => 37.7893768,
+                                           :longitude => -122.3895553,
+                                           :name => long_place_name,
+                                           :url => 'http://location_url.test' },
+                           'timestamp' => '1633034394', 'type' => 'location' }]
+        }.with_indifferent_access
+
+        expect { described_class.new(inbox: whatsapp_channel.inbox, params: params).perform }
+          .to change { Message.where(source_id: source_id).count }.from(0).to(1)
+
+        location_attachment = Message.find_by!(source_id: source_id).attachments.first
+        expect(location_attachment.fallback_title).to eq("#{long_place_name}, #{long_place_name}".first(255))
+        expect(location_attachment.fallback_title.length).to eq(255)
+      end
     end
 
     context 'when valid contact message params' do