Initial commit: OpenFUT Core

Offline Ultimate Team backend — game-independent REST API.

- 19 API endpoints: auth, profiles, clubs, cards, packs, squads,
  objectives, SBCs, match rewards, NPC market, statistics
- Axum + SQLite + SQLx with full migrations
- Weighted pack generator, SBC validation engine
- JSON-driven mod data (cards, packs, objectives, SBCs)
- 5 integration tests passing

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Cargo.toml

@@ -0,0 +1,38 @@
+[package]
+name = "openfut-core"
+version = "0.1.0"
+edition = "2021"
+authors = ["OpenFUT Contributors"]
+description = "Offline Ultimate Team backend — game-independent core"
+license = "MIT"
+repository = "https://github.com/openfut/openfut-core"
+
+[lib]
+name = "openfut_core"
+path = "src/lib.rs"
+
+[[bin]]
+name = "openfut-core"
+path = "src/main.rs"
+
+[dependencies]
+axum = { version = "0.7", features = ["macros"] }
+tokio = { version = "1", features = ["full"] }
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"
+sqlx = { version = "0.7", features = ["sqlite", "runtime-tokio-rustls", "migrate", "chrono", "uuid"] }
+tower-http = { version = "0.5", features = ["cors", "trace"] }
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+thiserror = "1"
+anyhow = "1"
+uuid = { version = "1", features = ["v4", "serde"] }
+chrono = { version = "0.4", features = ["serde"] }
+rand = "0.8"
+dotenvy = "0.15"
+axum-macros = "0.4"
+
+[dev-dependencies]
+axum-test = "14"
+tokio = { version = "1", features = ["full"] }
+tower = { version = "0.5", features = ["util"] }