[sbom] Add generation duration

proto/sbom/sbom.proto

@@ -4,6 +4,7 @@ option go_package = "github.com/DataDog/agent-payload/v5/sbom";
 
 package datadog.sbom;
 
+import "google/protobuf/duration.proto";
 import "google/protobuf/timestamp.proto";
 import "proto/deps/github.com/CycloneDX/specification/schema/bom-1.4.proto";
 
@@ -16,11 +17,12 @@ message SBOMPayload {
 }
 
 message SBOMEntity {
-  SBOMSourceType                     type        = 1;
-  string                             id          = 2; // Unique identifier to be able to correlated and "deduplicate" SBOM
-  optional google.protobuf.Timestamp generatedAt = 3; // the datetime of the SBOM generation
-  repeated string                    tags        = 4; // datadog tags that will be added by the agent depending of the SBOMSourceType
-  bool                               inUse       = 5; // Whether the SBOM concerns a running entity (running container) or an inert entity (image not used by any container)
+  SBOMSourceType                     type               = 1;
+  string                             id                 = 2; // Unique identifier to be able to correlated and "deduplicate" SBOM
+  optional google.protobuf.Timestamp generatedAt        = 3; // the datetime of the SBOM generation
+  repeated string                    tags               = 4; // datadog tags that will be added by the agent depending of the SBOMSourceType
+  bool                               inUse              = 5; // Whether the SBOM concerns a running entity (running container) or an inert entity (image not used by any container)
+  optional google.protobuf.Duration  generationDuration = 6; // SBOM generation duration (how long it took to generate the SBOM report)
   oneof sbom {
     cyclonedx.v1_4.Bom cyclonedx = 10; // only cyclonedx will be supported initially but putting it optional will allow us to move to another format later
     // spdx.SBOM      spdx      = 11; // SPDX can be added later as any other format.