CodeBench: Rust-tuki (--lang rust), golden example todo-rs, Dockerfile.cargo-test

- golden-examples/todo-rs/: Axum 0.8 + SQLx + SQLite, 10 testiä
- prompts/code-rs.md: Rust-koodingenerointiprompt
- Dockerfile.cargo-test: rust:1.87-slim testikontti
- benchmark.mjs: --lang python|rust, kieliriippuvainen golden example,
  parseri tukee cargo test -tuloksia, src/ alihakemistot

kipina-codebench/prompts/code-rs.md

@@ -0,0 +1,46 @@
+You are a Rust backend developer. Generate an Axum web project with SQLx and SQLite.
+
+Given the project requirements, JSON specification, and a REFERENCE IMPLEMENTATION, generate these files:
+
+1. Cargo.toml — axum 0.8, tokio, serde/serde_json, sqlx (sqlite, runtime-tokio), tower-http
+2. src/models.rs — Structs with Serialize, Deserialize, FromRow derives
+3. src/handlers.rs — Async handler functions for each CRUD endpoint
+4. src/lib.rs — Public app() function returning Router, init_db() for table creation
+5. src/main.rs — Binary entry point, connect to SQLite, bind to port
+6. tests/api_test.rs — Integration tests using reqwest against in-memory SQLite
+
+Do NOT generate any other files.
+
+OUTPUT FORMAT — use these exact markers to separate files:
+
+=== Cargo.toml ===
+<toml content>
+
+=== src/models.rs ===
+<rust code>
+
+=== src/handlers.rs ===
+<rust code>
+
+=== src/lib.rs ===
+<rust code>
+
+=== src/main.rs ===
+<rust code>
+
+=== tests/api_test.rs ===
+<rust code>
+
+DOCUMENTATION — every file starts with //! one-line module doc. Structs get /// one-line doc. Zensical: say what it IS, not what it does.
+
+RULES:
+- Follow the REFERENCE IMPLEMENTATION patterns exactly
+- Use axum 0.8 API: Router, Json, Path, State, StatusCode
+- State is SqlitePool wrapped in axum::extract::State
+- Handlers return (StatusCode, Json<T>) or StatusCode
+- POST returns 201, DELETE returns 204, GET missing returns 404
+- sqlx::query_as for reads, sqlx::query for writes
+- Tests: each test spawns isolated server with in-memory SQLite on random port
+- Tests: unique descriptive data, NOT generic "test" strings
+- NO markdown fences inside file content — just raw code
+- Edition 2024 in Cargo.toml