fix(gcp): align gcpSample aggregation functions with gcp queries to pass validation

Validator requires all queries within a golden metric entry to use the same
value function. Updates gcpSample: select clauses to match the gcp: changes:

- Latency DISTRIBUTION metrics: average → percentile(..., 95)
  (BackendLatencies, TotalLatencies, RttLatencies, ServingLatencies,
   ResponseLatenciesMilliseconds, online_serving.Latencies, replication.Latency,
   streamUpdate.Latencies)
- DELTA count metrics: average → sum
  (SentBytes/ReceivedBytes network counts, server.Error/Request/SentBytes,
   streamUpdate.Datapoint)
- GAUGE byte-level: sum → latest (storage.StoredBytes)
- GAUGE count: sum → average (storage.Tables, query.Count)
- GAUGE per-second: average → rate(sum(...), 1 second) (instance.network bytes)
- DELTA count with percentile: average → percentile (query.ExecutionTimes)
- LOCATION pipeline tasks: sum → average; prediction requests: average → sum
- HTTP LB latencies (unit=MS): remove /1000 from gcpSample (was wrong unit conversion)

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

Author: sparsi17

entity-types/infra-gcpaiplatformendpoint/golden_metrics.yml

@@ -36,7 +36,7 @@ bytesSent:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: average(prediction.online.network.SentBytes)
+      select: sum(prediction.online.network.SentBytes)
       from: GcpVertexAiEndpointSample
       eventId: entityGuid
       eventName: entityName
@@ -50,7 +50,7 @@ bytesReceived:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: average(prediction.online.network.ReceivedBytes)
+      select: sum(prediction.online.network.ReceivedBytes)
       from: GcpVertexAiEndpointSample
       eventId: entityGuid
       eventName: entityName

entity-types/infra-gcpaiplatformfeatureonlinestore/golden_metrics.yml

@@ -17,7 +17,7 @@ latencies:
   unit: MS
   queries:
     gcpSample:
-      select: average(featureonlinestore.onlineServing.ServingLatencies)
+      select: percentile(featureonlinestore.onlineServing.ServingLatencies, 95)
       from: GcpVertexAiFeatureOnlineStoreSample
       eventId: entityGuid
       eventName: entityName

entity-types/infra-gcpaiplatformfeaturestore/golden_metrics.yml

@@ -36,7 +36,7 @@ latency:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: average(featurestore.online_serving.Latencies)
+      select: percentile(featurestore.online_serving.Latencies, 95)
       from: GcpVertexAiFeaturestoreSample
       eventId: entityGuid
       eventName: entityName

entity-types/infra-gcpaiplatformindex/golden_metrics.yml

@@ -22,7 +22,7 @@ latencies:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: average(matchingEngine.streamUpdate.Latencies)
+      select: percentile(matchingEngine.streamUpdate.Latencies, 95)
       from: GcpVertexAiIndexSample
       eventId: entityGuid
       eventName: entityName
@@ -36,7 +36,7 @@ datapointCount:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: average(matchingEngine.streamUpdate.Datapoint)
+      select: sum(matchingEngine.streamUpdate.Datapoint)
       from: GcpVertexAiIndexSample
       eventId: entityGuid
       eventName: entityName

entity-types/infra-gcpaiplatformlocation/golden_metrics.yml

@@ -13,7 +13,7 @@ pipelineTasks:
   unit: COUNT
   queries:
     gcpSample:
-      select: sum(executingVertexaiPipelineTasks)
+      select: average(executingVertexaiPipelineTasks)
       from: GcpVertexAiLocationSample
       eventId: entityGuid
       eventName: entityName
@@ -28,7 +28,7 @@ onlinePredictionRequestsPerBaseModel:
   unit: COUNT
   queries:
     gcpSample:
-      select: average(onlinePredictionRequestsPerBaseModel)
+      select: sum(onlinePredictionRequestsPerBaseModel)
       from: GcpVertexAiLocationSample
       eventId: entityGuid
       eventName: entityName

entity-types/infra-gcpappengineservice/golden_metrics.yml

@@ -50,7 +50,7 @@ latency:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: average(`server.ResponseLatenciesMilliseconds`) / 1000
+      select: percentile(`server.ResponseLatenciesMilliseconds`, 95) / 1000
       from: GcpAppEngineServiceSample
       eventId: entityGuid
       eventName: entityName

entity-types/infra-gcpbigquerydataset/golden_metrics.yml

@@ -8,7 +8,7 @@ storedBytes:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: sum(`storage.StoredBytes`)
+      select: latest(`storage.StoredBytes`)
       from: GcpBigQueryDataSetSample
       eventId: entityGuid
       eventName: entityName
@@ -22,7 +22,7 @@ tables:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: sum(`storage.Tables`)
+      select: average(`storage.Tables`)
       from: GcpBigQueryDataSetSample
       eventId: entityGuid
       eventName: entityName

entity-types/infra-gcpbigqueryproject/golden_metrics.yml

@@ -8,7 +8,7 @@ queries:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: sum(`query.Count`)
+      select: average(`query.Count`)
       from: GcpBigQueryProjectSample
       eventId: entityGuid
       eventName: entityName
@@ -22,7 +22,7 @@ executionTime:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: average(`query.ExecutionTimes`)
+      select: percentile(`query.ExecutionTimes`, 95)
       from: GcpBigQueryProjectSample
       eventId: entityGuid
       eventName: entityName

entity-types/infra-gcpbigtabletable/golden_metrics.yml

@@ -8,7 +8,7 @@ replicationRequestLatenciesMs:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: average(replication.Latency)
+      select: percentile(replication.Latency, 95)
       from: GcpBigtableTableSample
       eventId: entityGuid
       eventName: entityName
@@ -22,7 +22,7 @@ serverRequestsFailed:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: average(server.Error)
+      select: sum(server.Error)
       from: GcpBigtableTableSample
       eventId: entityGuid
       eventName: entityName
@@ -36,7 +36,7 @@ serverRequests:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: average(server.Request)
+      select: sum(server.Request)
       from: GcpBigtableTableSample
       eventId: entityGuid
       eventName: entityName
@@ -50,7 +50,7 @@ uncompressedBytesOfResponseData:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: average(server.SentBytes)
+      select: sum(server.SentBytes)
       from: GcpBigtableTableSample
       eventId: entityGuid
       eventName: entityName

entity-types/infra-gcpexternalloadbalancer/golden_metrics.yml

@@ -36,7 +36,7 @@ latency:
       eventId: entity.guid
       eventName: entity.name
     gcpSample:
-      select: average(`l3.external.RttLatencies`) / 1000
+      select: percentile(`l3.external.RttLatencies`, 95) / 1000
       from: GcpExternalLoadBalancerSample
       eventId: entityGuid
       eventName: entityName