refactor: remove proto comments, keep explanation in cache.go only

Signed-off-by: Aman-Cool <aman017102007@gmail.com>

Author: Aman-Cool

api/v2alpha1/cache_key.proto

@@ -21,10 +21,6 @@ import "google/protobuf/struct.proto";
 import "pipeline_spec.proto";
 
 message CacheKey {
-  // Input artifact identifiers. Each string in ArtifactNameList now uses the format
-  // "name@uri" to include both the artifact name and URI, ensuring different data
-  // sources produce different cache keys. Previously only names were used, which
-  // caused incorrect cache reuse when artifacts had the same name but different URIs.
   map<string, ArtifactNameList> inputArtifactNames = 1;
   map<string, Value> inputParameters = 2 [deprecated = true];
   map<string, RuntimeArtifact> outputArtifactsSpec = 3;
@@ -40,8 +36,5 @@ message ContainerSpec {
 }
 
 message ArtifactNameList {
-  // Artifact identifiers. Format: "name@uri" when URI is present, or just "name"
-  // when URI is empty. This format ensures cache keys differ for artifacts with
-  // the same name but different data sources.
   repeated string artifactNames = 1;
 }

backend/src/v2/cacheutils/cache.go

@@ -187,10 +187,8 @@ func (c *client) GenerateCacheKey(
 	for inputArtifactName, inputArtifactList := range inputs.GetArtifacts() {
 		inputArtifactNameList := cachekey.ArtifactNameList{ArtifactNames: make([]string, 0)}
 		for _, artifact := range inputArtifactList.Artifacts {
-			// CRITICAL FIX: Include both name AND URI in the cache key identifier.
-			// Previously only the name was used, which caused incorrect cache reuse
-			// when different data sources had artifacts with the same logical name.
-			// The format "name@uri" ensures different URIs produce different cache keys.
+			// Include artifact URI in the cache key to prevent incorrect cache reuse
+			// when different data sources share the same artifact name. Format: "name@uri".
 			artifactIdentifier := artifact.GetName()
 			if uri := artifact.GetUri(); uri != "" {
 				artifactIdentifier = artifact.GetName() + "@" + uri