feat(azure): enable index tuning for postgres in YT

.azure/infrastructure/main.bicep

@@ -58,6 +58,7 @@ import { Sku as PostgresSku } from '../modules/postgreSql/create.bicep'
 
 param postgresConfiguration {
   sku: PostgresSku
+  enableIndexTuning: bool
   enableQueryPerformanceInsight: bool
 }
 
@@ -205,6 +206,7 @@ module postgresql '../modules/postgreSql/create.bicep' = {
       : secrets.dialogportenPgAdminPassword
     sku: postgresConfiguration.sku
     appInsightWorkspaceName: appInsights.outputs.appInsightsWorkspaceName
+    enableIndexTuning: postgresConfiguration.enableIndexTuning
     enableQueryPerformanceInsight: postgresConfiguration.enableQueryPerformanceInsight
     subnetId: vnet.outputs.postgresqlSubnetId
     vnetId: vnet.outputs.virtualNetworkId

.azure/infrastructure/prod.bicepparam

@@ -35,6 +35,7 @@ param postgresConfiguration = {
     tier: 'GeneralPurpose'
   }
   enableQueryPerformanceInsight: false
+  enableIndexTuning: false
 }
 
 param redisSku = {

.azure/infrastructure/staging.bicepparam

@@ -34,6 +34,7 @@ param postgresConfiguration = {
     name: 'Standard_B1ms'
     tier: 'Burstable'
   }
+  enableIndexTuning: false
   enableQueryPerformanceInsight: true
 }
 

.azure/infrastructure/test.bicepparam

@@ -34,6 +34,7 @@ param postgresConfiguration = {
     name: 'Standard_B2s'
     tier: 'Burstable'
   }
+  enableIndexTuning: false
   enableQueryPerformanceInsight: true
 }
 

.azure/infrastructure/yt01.bicepparam

@@ -34,6 +34,7 @@ param postgresConfiguration = {
     name: 'Standard_D4ads_v5'
     tier: 'GeneralPurpose'
   }
+  enableIndexTuning: true
   enableQueryPerformanceInsight: true
 }
 

.azure/modules/postgreSql/create.bicep

@@ -34,6 +34,9 @@ param sku Sku
 @description('Enable query performance insight')
 param enableQueryPerformanceInsight bool
 
+@description('Enable index tuning')
+param enableIndexTuning bool
+
 @description('The name of the Application Insights workspace')
 param appInsightWorkspaceName string
 
@@ -141,6 +144,16 @@ resource pgms_wait_sampling_query_capture_mode 'Microsoft.DBforPostgreSQL/flexib
   dependsOn: [pg_qs_query_capture_mode]
 }
 
+resource index_tuning_mode 'Microsoft.DBforPostgreSQL/flexibleServers/configurations@2024-08-01' = if (enableIndexTuning) {
+  parent: postgres
+  name: 'index_tuning.mode'
+  properties: {
+    value: 'report'
+    source: 'user-override'
+  }
+  dependsOn: [pgms_wait_sampling_query_capture_mode]
+}
+
 resource appInsightsWorkspace 'Microsoft.OperationalInsights/workspaces@2023-09-01' existing = {
   name: appInsightWorkspaceName
 }