fix: pass numeric measurements via measures arg in env_selection.completed

workspaceFolderCount, resolvedFolderCount, and settingErrorCount were
passed as string properties but are numeric measurements. Passing them
as string properties causes them to be silently dropped by the telemetry
pipeline. Move them to the measures argument so they are recorded.

globalScopeDeferred remains a string property (boolean serialized as
'true'/'false') and is unaffected.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: eleanorjboyd

src/common/telemetry/constants.ts

@@ -106,6 +106,8 @@ export enum EventNames {
      * Duration measures the blocking time (excludes deferred global scope).
      * Properties:
      * - globalScopeDeferred: boolean (true = global scope fired in background, false = awaited)
+     * Measures (sent in the `measures` arg because of `isMeasurement: true` in GDPR):
+     * - duration: number (ms)
      * - workspaceFolderCount: number (total workspace folders)
      * - resolvedFolderCount: number (folders that resolved with a non-undefined env)
      * - settingErrorCount: number (user-configured settings that could not be applied)
@@ -451,9 +453,6 @@ export interface IEventNamePropertyMapping {
     */
     [EventNames.ENV_SELECTION_COMPLETED]: {
         globalScopeDeferred: boolean;
-        workspaceFolderCount: number;
-        resolvedFolderCount: number;
-        settingErrorCount: number;
     };
 
     /* __GDPR__

src/features/interpreterSelection.ts

@@ -396,12 +396,20 @@ export async function applyInitialEnvironmentSelection(
     }
 
     // Duration measures blocking time only (excludes deferred global scope).
-    sendTelemetryEvent(EventNames.ENV_SELECTION_COMPLETED, selectionStopWatch.elapsedTime, {
-        globalScopeDeferred: workspaceFolderResolved,
-        workspaceFolderCount: folders.length,
-        resolvedFolderCount,
-        settingErrorCount: allErrors.length,
-    });
+    // Numeric values are sent via the measures argument; pass them as properties
+    // causes them to be dropped by the telemetry pipeline.
+    sendTelemetryEvent(
+        EventNames.ENV_SELECTION_COMPLETED,
+        {
+            duration: selectionStopWatch.elapsedTime,
+            workspaceFolderCount: folders.length,
+            resolvedFolderCount,
+            settingErrorCount: allErrors.length,
+        },
+        {
+            globalScopeDeferred: workspaceFolderResolved,
+        },
+    );
 }
 
 /**