Constant TEMPLATE_MANIFEST 

pub const TEMPLATE_MANIFEST: &str = r#"[package]
name = "metrale-warm-template"
version = "0.1.0"
edition = "2021"

[dependencies]
axum = { version = "0.8", features = ["json", "macros", "ws", "multipart"] }
tokio = { version = "1", features = ["full"] }
serde = { version = "1", features = ["derive"] }
serde_json = "1"
tower = { version = "0.5", features = ["full"] }
tower-http = { version = "0.6", features = ["full"] }
hyper = { version = "1", features = ["full"] }
reqwest = { version = "0.12", features = ["json"] }
anyhow = "1"
thiserror = "2"
tracing = "0.1"
tracing-subscriber = { version = "0.3", features = ["env-filter"] }

[dev-dependencies]
reqwest = { version = "0.12", features = ["json"] }
"#;

2026-09-26: Parses to the same TOML as the Cargo.toml heredoc in warm_cargo_cache.sh (asserted in the tests).