systemd prototyping (#1960)

Summary: Pull Request resolved: #1960

Differential Revision: D87582955

Author: shayne-fletcher

hyperactor_mesh/Cargo.toml

@@ -89,8 +89,13 @@ criterion = { version = "0.5.1", features = ["async_tokio", "csv_output"] }
 itertools = "0.14.0"
 maplit = "1.0"
 proptest = "1.5"
+systemd = { version = "0.10.1", optional = true }
 timed_test = { version = "0.0.0", path = "../timed_test" }
 tracing-test = { version = "0.2.3", features = ["no-env-filter"] }
 
+[features]
+default = []
+systemd = ["dep:systemd"]
+
 [lints]
 rust = { unexpected_cfgs = { check-cfg = ["cfg(fbcode_build)"], level = "warn" } }