Refinement 💄

[underscope]

• Added admin invitation system with invite:admin script for user onboarding
• Added user migration
• Enabled auto migrations for database schema management
• Exposed OpenAPI specification for API documentation
• Improved email error logging for better debugging
• Reorganized backend structure: moved openapi utils to common, pino config to root level
• Renamed instrument.ts to sentry.ts for clarity
• Moved user entity to dedicated module structure
• Removed unused frontend API types (api.ts)
• Updated dependencies across all workspace packages
• Minor infrastructure improvements to Pulumi configuration and deployment
• Updated Docker configurations
• Enhanced OpenAPI generation script
• General code cleanup and formatting improvements