Feature/cluster

[jamals86]

This pull request introduces several dependency updates and project structure documentation improvements, as well as minor code changes to simplify username handling in authentication endpoints. The most significant changes are the expansion of the workspace/project structure, new and updated dependencies (notably for multipart HTTP support and cryptography), and simplification of username conversion logic in the API.

Dependency and Feature Additions:

• Added new crates to the workspace for modularization and expanded features, including kalamdb-filestore, kalamdb-session, and kalamdb-configs. [1] [2]
• Enabled the multipart feature in reqwest and added the actix-multipart crate to support multipart HTTP requests (e.g., file uploads). [1] [2] [3]
• Switched the jsonwebtoken crate to use the aws_lc_rs feature for cryptography, likely for better compatibility or security.
• Added the sha2 crate for hashing needs and updated several other dependencies to newer versions. [1] [2]

Project Structure and Documentation:

• Updated the AGENTS.md project structure section to reflect the expanded modular architecture and clarify the responsibilities of each crate.

Authentication Endpoint Simplification:

• Simplified username extraction in login_handler, refresh_handler, and me_handler by using the username string directly, rather than converting it to a typed UserName. [1] [2] [3]

Notes and Planning:

• Added new planning notes in Notes.md for upcoming features and bug fixes, including system columns options, SQL error handling, and file permission checks.