chore: Increase custom filter limit from 50 to 1000 per user (#12603)

# Pull Request Template

## Description

This PR increases the custom filter limit from 50 to 1000 per user

## Type of change

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

## How Has This Been Tested?

### Screenshot

<img width="1264" height="71" alt="image"
src="https://github.com/user-attachments/assets/e12667bb-147c-4115-b8a8-9113fca471db"
/>



## Checklist:

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

spec/controllers/api/v1/accounts/custom_filters_controller_spec.rb

@@ -93,9 +93,9 @@ RSpec.describe 'Custom Filters API', type: :request do
         expect(json_response['name']).to eq 'vip-customers'
       end
 
-      it 'gives the error for 51st record' do
+      it 'gives the error for 1001st record' do
         CustomFilter.delete_all
-        CustomFilter::MAX_FILTER_PER_USER.times do
+        Limits::MAX_CUSTOM_FILTERS_PER_USER.times do
           create(:custom_filter, user: user, account: account)
         end
 
@@ -107,7 +107,7 @@ RSpec.describe 'Custom Filters API', type: :request do
         expect(response).to have_http_status(:unprocessable_entity)
         json_response = response.parsed_body
         expect(json_response['message']).to include(
-          'Account Limit reached. The maximum number of allowed custom filters for a user per account is 50.'
+          'Account Limit reached. The maximum number of allowed custom filters for a user per account is 1000.'
         )
       end
     end