**chore: remove outdated changelog and summary documents**

- Deleted `CHANGES.md`, `CHANGES_SUMMARY.md`, `CONCURRENCY_ANALYSIS.md`, `CONCURRENCY_IMPLEMENTATION_SUMMARY.md`, and related developer documentation files.
- Removed redundant or legacy content no longer aligned with the current codebase and workflows.
- Updated repository to reflect streamlined documentation approach, reducing clutter and improving maintainability.

**Purpose**: Simplify and declutter repository by removing obsolete documentation files, ensuring it remains focused and relevant.

docs/development/MARKDOWN_CONVENTIONS.md

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+# Markdown File Naming Conventions
+
+This document outlines the naming conventions for markdown (.md) files in the Brainy project.
+
+## Naming Patterns
+
+Based on the current project structure, we follow these conventions for markdown files:
+
+### Uppercase Naming
+
+Use uppercase filenames for project-level documentation:
+
+- README.md - Project overview and main documentation
+- CONTRIBUTING.md - Contribution guidelines
+- LICENSE.md - License information
+- CHANGES.md - Changelog
+- CODE_OF_CONDUCT.md - Code of conduct
+- Other project-level documentation files
+
+Examples: `README.md`, `CONTRIBUTING.md`, `CODE_OF_CONDUCT.md`
+
+### Lowercase Naming
+
+Use lowercase filenames for technical documentation and implementation details:
+
+- Technical guides
+- Implementation details
+- Architecture documentation
+- Specific feature documentation
+
+Examples: `scalingStrategy.md`, `statistics.md`
+
+## Rationale
+
+This convention makes it easy to distinguish between:
+
+1. Project-level documentation that applies to the entire project and is relevant to all contributors and users (uppercase)
+2. Technical documentation that focuses on specific implementation details and is primarily relevant to developers working on those features (lowercase)
+
+## Recommendations
+
+1. Continue using uppercase names for project-level documentation files
+2. Continue using lowercase names for technical documentation files
+3. Be consistent within each category
+4. Always use `README.md` (uppercase) for directory-level documentation
+
+## Examples
+
+### Project-Level Documentation (Uppercase)
+
+- README.md
+- CONTRIBUTING.md
+- LICENSE.md
+- CHANGES.md
+- CODE_OF_CONDUCT.md
+- DEVELOPERS.md
+- STORAGE_TESTING.md
+- THREADING.md
+
+### Technical Documentation (Lowercase)
+
+- scalingStrategy.md
+- statistics.md
+- architecture.md
+- implementation-details.md
+
+By following these conventions, we maintain consistency and make it easier for contributors to find the right documentation.