fix(engine,producer,cli): close review gaps in sub-timeline fail-fast

Address PR #2045 review feedback:
- Share a SubTimelineWaitOutcome type (engine) end-to-end instead of
  widening to string across CapturePerfSummary / RenderPerfSummary /
  telemetry, so the three layers can't drift.
- Dedupe scriptLoadFailures on push — a 4xx response and its trailing
  requestfailed both recorded the same URL, doubling the failed-URL
  list in the fail-fast warning.
- Thread the sub-timeline-wait outcome into render_error (not just
  render_complete): a render that fail-fasts and then fails downstream
  (pollVideosReady, extract, encode) previously dropped this signal on
  the floor. dedupPerfs is now function-scoped so the catch path can
  read it, same treatment as the existing captureAttempts array.

packages/cli/src/telemetry/events.ts

@@ -1,8 +1,11 @@
 import { redactTelemetryString, type OutputResolutionIssueKind } from "@hyperframes/core";
+import type { SubTimelineWaitOutcome } from "@hyperframes/engine";
 import { trackEvent } from "./client.js";
 import { readConfig } from "./config.js";
 
 export interface RenderObservabilityTelemetryPayload {
+  /** Worst sub-composition timeline wait outcome across sessions. */
+  subTimelineWait?: SubTimelineWaitOutcome;
   observabilityRenderJobId?: string;
   observabilityCompositionHash?: string;
   observabilityEventCount?: number;
@@ -47,6 +50,7 @@ export interface RenderObservabilityTelemetryPayload {
 
 function renderObservabilityEventProperties(props: RenderObservabilityTelemetryPayload) {
   return {
+    sub_timeline_wait: props.subTimelineWait,
     observability_render_job_id: props.observabilityRenderJobId,
     observability_composition_hash: props.observabilityCompositionHash,
     observability_event_count: props.observabilityEventCount,
@@ -148,7 +152,6 @@ export function trackRenderComplete(
     captureAvgMs?: number;
     /** Warmup-robust per-frame capture median (basis for speedup estimates). */
     captureP50Ms?: number;
-    subTimelineWait?: string;
     /** <video> element count (speedup segmentation: injection comps read lower). */
     videoCount?: number;
     capturePeakMs?: number;
@@ -222,7 +225,6 @@ export function trackRenderComplete(
       speed_ratio: props.speedRatio,
       capture_avg_ms: props.captureAvgMs,
       capture_p50_ms: props.captureP50Ms,
-      sub_timeline_wait: props.subTimelineWait,
       video_count: props.videoCount,
       capture_peak_ms: props.capturePeakMs,
       peak_memory_mb: props.peakMemoryMb,

packages/cli/src/telemetry/renderObservability.ts

@@ -58,7 +58,10 @@ export function renderObservabilityTelemetryPayload(
 export function renderJobObservabilityTelemetryPayload(
   job: RenderJob | undefined,
 ): RenderObservabilityTelemetryPayload {
-  return renderObservabilityTelemetryPayload(
-    job?.errorDetails?.observability ?? job?.perfSummary?.observability,
-  );
+  return {
+    ...renderObservabilityTelemetryPayload(
+      job?.errorDetails?.observability ?? job?.perfSummary?.observability,
+    ),
+    subTimelineWait: job?.errorDetails?.subTimelineWait ?? job?.perfSummary?.subTimelineWait,
+  };
 }