Integration tests for routing, filesystem, upgrades, rollback, cargo, and paths

cli/tests/crates/cargo-fail/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "cargo-fail"
+version = "0.1.0"
+edition = "2024"
+
+[workspace]

cli/tests/crates/cargo-fail/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    missing_function();
+}