fix(workspace): clear strict lint and test debt

hemx-derive/tests/compile_fail.rs

@@ -982,7 +982,9 @@ fn check_fixture(fixture: &Fixture) -> std::process::Output {
         .arg("--quiet")
         .arg("--manifest-path")
         .arg(fixture.path.join("Cargo.toml"))
-        .env("CARGO_TARGET_DIR", fixture.path.join("target"))
+        // Cargo serializes access to a shared target directory, so all fixtures reuse
+        // the same compiled hemx dependency graph instead of rebuilding it per test.
+        .env("CARGO_TARGET_DIR", fixture_target_dir())
         .output()
         .expect("cargo check fixture runs")
 }
@@ -994,6 +996,13 @@ fn repo_path(crate_name: &str) -> PathBuf {
         .join(crate_name)
 }
 
+fn fixture_target_dir() -> PathBuf {
+    Path::new(env!("CARGO_MANIFEST_DIR"))
+        .parent()
+        .expect("crate has workspace parent")
+        .join("target/compile-fixtures")
+}
+
 struct Fixture {
     path: PathBuf,
 }