Core Crate

Summary

Implement the shared public Rust crate (libs/core) with data models, validation, scoring profiles, sync protocol, and offline queue management. This crate ships to all consumers — server, dashboard, PWA, iOS, Android.

Requirements

• All entity models (User, Org, Drill, Course, Event, Score, ScoringProfile, etc.)
• Scoring profile system with built-in profiles (USPSA, IDPA, IPSC, Steel Challenge) and calculation methods
• Validation logic for all entities
• Offline score queue and flush logic
• Score deduplication and final-score filtering
• No server-only logic — everything here is client-safe and can be decompiled