tweak(aura-cli): understate the --help about-line (drop the game-engine framing)

crates/aura-cli/src/main.rs

@@ -3601,7 +3601,7 @@ fn run_dispatch(args: RunArgs) -> Result<RunReport, String> {
 /// The `aura` root parser. `#[command(version)]` reads `CARGO_PKG_VERSION`
 /// (the workspace `0.1.0`), so `aura --version` prints `aura 0.1.0`.
 #[derive(Parser)]
-#[command(name = "aura", version, about = "A game engine for traders — research CLI", infer_long_args = true)]
+#[command(name = "aura", version, about = "Author, backtest, and validate trading strategies — research CLI", infer_long_args = true)]
 struct Cli {
     #[command(subcommand)]
     command: Command,