fix(telemetry): send feedback as plain events, not PostHog surveys

CLI and Studio feedback were emitted as `survey sent` with `$survey_*`
properties, so every rating was ingested as a PostHog survey response even
though no survey definition, targeting, or popover backs them.

Emit `cli_render_feedback` and `studio_feedback` with plain `rating` /
`comment` properties instead. Same fields, same call sites, same opt-out.

packages/studio/src/telemetry/events.test.ts

@@ -84,8 +84,8 @@ describe("studio telemetry events", () => {
     trackStudioFeedback({ rating });
 
     expect(trackEvent).toHaveBeenCalledWith(
-      "survey sent",
-      expect.objectContaining({ $survey_response: rating, rating_scale: 10 }),
+      "studio_feedback",
+      expect.objectContaining({ rating, rating_scale: 10 }),
     );
   });
 });

packages/studio/src/telemetry/events.ts

@@ -69,11 +69,12 @@ export function trackStudioSegmentEaseEdit(props: { ease: string }): void {
 }
 
 export function trackStudioFeedback(props: { rating: number; comment?: string }): void {
-  trackEvent("survey sent", {
-    $survey_id: "studio_experience",
-    $survey_response: props.rating,
+  // Plain product event, not a PostHog survey response: nothing here is served
+  // by the surveys product (no survey definition, no targeting, no popover).
+  trackEvent("studio_feedback", {
+    rating: props.rating,
     rating_scale: 10,
-    ...(props.comment ? { $survey_response_2: props.comment } : {}),
+    ...(props.comment ? { comment: props.comment } : {}),
     doctor_summary: getBrowserDoctorSummary(),
     source: "studio",
   });