Create roadmap file for query module development.

Author: makr-code

src/query/roadmap.md

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+# Query Module Development Roadmap
+
+## Overview
+This roadmap provides a comprehensive outline for the development of the query module for ThemisDB, detailing the phases, planned features, and performance targets.
+
+## Phases
+1. **Initial Planning**  
+   * Define key use cases  
+   * Gather requirements from stakeholders  
+   * Create design documents.
+   
+2. **Development**  
+   * Implement foundational features  
+   * Set up database queries and structures  
+   * Develop first iteration of the API.
+   
+3. **Testing**  
+   * Comprehensive unit and integration testing  
+   * Performance testing for scalability  
+   * User acceptance testing with stakeholders.
+   
+4. **Release**  
+   * Prepare documentation and deployment strategy  
+   * Conduct a final review of features and performance.
+   
+5. **Post-Release**  
+   * Monitor performance in production  
+   * Gather user feedback for future improvements.
+
+## Planned Features
+- **Basic CRUD Operations**
+  - Implementation of standard create, read, update, delete functionality for query objects.
+- **Advanced Filtering**
+  - Support for advanced filtering options including logical operations.
+- **Performance Optimization**  
+  - Target response time under 200ms for standard queries.
+- **Caching Mechanism**  
+  - Implement caching to improve performance on frequently accessed data.
+
+## Performance Targets
+- **Initial Response Time**  
+  - Aim for <200ms for simple queries.
+- **Scalability**  
+  - Support at least 100 concurrent users without significant degradation in performance.
+- **Database Size Management**  
+  - Ensure efficient handling of up to 1 million records with optimized queries.
+
+## Timeline
+- **Q1 2026**: Complete planning phase and start development.
+- **Q2 2026**: Complete first version implementation, testing interim releases.
+- **Q3 2026**: Launch first stable version of the query module.
+- **Q4 2026**: Gather feedback and begin planning for feature updates and enhancements.
+
+## Conclusion
+This roadmap aims to provide a structured approach to the efficient development of the query module, ensuring that it meets user needs and performance benchmarks.