fix: Disable SSL verification for LINE webhooks in development (#12960)

## Summary

- Fixes SSL certificate verification errors when testing LINE webhooks
in development environments
- Configures the LINE Bot API client to skip SSL verification only in
development mode

## Background

When testing LINE webhooks locally on macOS, the LINE Bot SDK was
failing with:
```
OpenSSL::SSL::SSLError: SSL_connect returned=1 errno=0 state=error: certificate verify failed (unable to get certificate CRL)
```

This occurs because the LINE Bot SDK tries to fetch user profiles via
HTTPS, and OpenSSL on macOS development environments may not have proper
access to Certificate Revocation Lists (CRLs).

## Changes

- Added `http_options` configuration to the LINE Bot client in
`Channel::Line#client`
- Sets `verify_mode: OpenSSL::SSL::VERIFY_NONE` only when
`Rails.env.development?` is true
- Production environments continue to use full SSL verification for
security

## Test Plan

- [x] Send a LINE message to trigger webhook in development
- [x] Verify webhook is processed without SSL errors
- [x] Confirm change only applies in development mode

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

app/models/channel/line.rb

@@ -40,6 +40,8 @@ class Channel::Line < ApplicationRecord
       config.channel_id = line_channel_id
       config.channel_secret = line_channel_secret
       config.channel_token = line_channel_token
+      # Skip SSL verification in development to avoid certificate issues
+      config.http_options = { verify_mode: OpenSSL::SSL::VERIFY_NONE } if Rails.env.development?
     end
   end
 end