Implement advanced search for subscriptions with Elasticsearch

[Smartdevs17]

Description

Basic search is slow and limited. Implement full-text search across subscriptions using Elasticsearch with faceted filtering and fuzzy matching.

Acceptance Criteria

• Elasticsearch integration for subscription indexing
• Full-text search on customer name, email, plan name, notes
• Faceted filters (status, plan, price range, date range)
• Fuzzy matching for typo tolerance
• Search result highlighting
• Saved searches with notification on new matches

Technical Scope

• backend/services/search/ElasticsearchService.ts
• app/services/searchService.ts
• app/screens/AdvancedSearchScreen.tsx
• Edge: index lag, analyzer configuration for multilingual search, reindexing during schema changes

[Max-Owolabi]

@Max-Owolabi has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I am a software engineer and i have good knowledge in resolving issues like this

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Max-Owolabi to this issue.

[drips-wave]

Congratulations, @Max-Owolabi! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @Max-Owolabi: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊