fix: update omniauth to latest to resolve heroku deployment issues (#12749)

# Pull Request Template

## Description

Fixes https://github.com/chatwoot/chatwoot/issues/12553

Heroku build was failing due to `omniauth` version mismatch. Also, added
`NODE_OPTIONS=--max-old-space-size=4096` to handle OOM during Vite
build.

## Type of change

Please delete options that are not relevant.

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

## How Has This Been Tested?

- Tested on heroku

## 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
- [x] I have made corresponding changes to the documentation
- [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
- [x] Any dependent changes have been merged and published in downstream
modules

Gemfile.lock

@@ -594,7 +594,7 @@ GEM
     oj (3.16.10)
       bigdecimal (>= 3.0)
       ostruct (>= 0.2)
-    omniauth (2.1.3)
+    omniauth (2.1.4)
       hashie (>= 3.4.6)
       logger
       rack (>= 2.2.3)
@@ -653,7 +653,7 @@ GEM
       rack (>= 2.0.0)
     rack-mini-profiler (3.2.0)
       rack (>= 1.2.0)
-    rack-protection (4.1.1)
+    rack-protection (4.2.1)
       base64 (>= 0.1.0)
       logger (>= 1.6.0)
       rack (>= 3.0.0, < 4)

app.json

@@ -36,6 +36,10 @@
     "REDIS_OPENSSL_VERIFY_MODE":{
       "description": "OpenSSL verification mode for Redis connections. ref https://help.heroku.com/HC0F8CUS/redis-connection-issues",
       "value": "none"
+    },
+    "NODE_OPTIONS": {
+      "description": "Increase V8 heap for Vite build to avoid OOM",
+      "value": "--max-old-space-size=4096"
     }
   },
   "formation": {