Move process wiring, technical adapters, and cross-cutting contracts out of flat internal/ packages so new code has a clear home without changing business layout.
- Added ./wavelet reset-passwd subcommand to reset user passwords via CLI
- Supported --user flag; if not specified, prompts for username interactively
- Supported --password flag; if not specified, generates a secure random password
- Handled access token deletion and cache invalidation
- Added comprehensive unit tests