build(app): mirror release profile from workspace

because cargo's workspace profiles are not inherited when doing cargo install

crates/irtt-app/Cargo.toml

@@ -60,3 +60,9 @@ tokio = { version = "1.53.1", default-features = false, features = ["rt", "time"
 [dev-dependencies]
 irtt-server.workspace = true
 tokio = { version = "1.53.1", default-features = false, features = ["rt", "sync"] }
+
+[profile.release]
+opt-level = "z"
+lto = true
+codegen-units = 1
+strip = "symbols"