feat: Add doc build flags

err_trail/Cargo.toml

@@ -25,4 +25,9 @@ log = ["dep:log"]
 # Enables support for the defmt crate, which works with no_std. Adds methods to `Result` that are applied on `Err` - e.g. `result.warn(...)`.
 defmt = ["dep:defmt"]
 # Enables support for the log/tracing/defmt api, without pulling in any crates. Allowing a downstream to choose the appropriate crate.
-stub = []
+stub = []
+
+[package.metadata.docs.rs]
+all-features = false
+features = ["tracing"]
+rustdoc-args = ["--cfg", "docsrs"]