Add logging to PVF and other related parts (#3596)

Co-authored-by: Bastian Köcher <bkchr@users.noreply.github.com>

polkadot/node/core/pvf/src/artifacts.rs

@@ -54,7 +54,7 @@ impl Artifact {
 /// multiple engine implementations the artifact ID should include the engine type as well.
 #[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct ArtifactId {
-	code_hash: ValidationCodeHash,
+	pub(crate) code_hash: ValidationCodeHash,
 }
 
 impl ArtifactId {
@@ -84,6 +84,25 @@ impl ArtifactId {
 	}
 }
 
+/// A bundle of the artifact ID and the path.
+///
+/// Rationale for having this is two-fold:
+///
+/// - While we can derive the artifact path from the artifact id, it makes sense to carry it around
+/// sometimes to avoid extra work.
+/// - At the same time, carrying only path limiting the ability for logging.
+#[derive(Debug, Clone)]
+pub struct ArtifactPathId {
+	pub(crate) id: ArtifactId,
+	pub(crate) path: PathBuf,
+}
+
+impl ArtifactPathId {
+	pub(crate) fn new(artifact_id: ArtifactId, cache_path: &Path) -> Self {
+		Self { path: artifact_id.path(cache_path), id: artifact_id }
+	}
+}
+
 pub enum ArtifactState {
 	/// The artifact is ready to be used by the executor.
 	///