### Changed
- Mildly reformatted `README.md`
- A development mode check for the `app.state.ip_pool`'s initialization (caused application failure in production only)
### Fixed
- Improper formatting of blockquote Alerts in `README.md`
### Added
- This `CHANGELOG.md` file.
- Structured logging with `structlog`
- Readable `ConsoleRenderer` for local development
- `JSONRenderer` for production logging
- Request-Id Middleware with `asgi-correlation-id`
- Expanded README.md with more comprehensive instructions for installation & usage
- Repository-wide improved documentation details, comments
- CodeSpell exceptions in VSCode workspace settings
### Changed
- Switched from `hypercorn` to `uvicorn` for ASGI runtime
- Switched to direct module 'serve' command in `backend/run.sh` & `backend/railway.json`
- Relocated `.tool-versions` to project root
- Massively overhauled run.sh scripts, mostly for backend service
- Improved environment variable access in logging setup
- Root logger now adheres to the same format as the rest of the application
- Hide IP list when error occurs on client
- `run.sh` passes through all arguments, e.g. bpython REPL via `./run.sh repl`
- Use UTC timezone for timestamps, localize human readable strings, fixing 4 hour offset issue
- `is_development` available globally from `utilities` module
### Removed
- Deprecated `startup` and `shutdown` events
- Development-only randomized IP address pool for testing
- Default environment variables through this, instead of .env
- Added some basic checks to ensure developers don't stub their toe
- Use `railway link`, injecting environment variables without insecure dotenv files
