feat(engine,producer,cli): drawElement release telemetry on render_complete (#2002)

Default-on drawElement ships with a runtime self-verification net (#1998);
this makes its in-the-wild behavior observable. Every render_complete event
now answers: which capture mode actually ran, why drawElement disengaged
when it did (compile gate / producer clamp / engine init gate), whether the
self-verify net fired and why, and how much margin verification had.

Follows the static-dedup telemetry pattern: engine session fields →
CapturePerfSummary → RenderPerfSummary.drawElement → snake_case props on
render_complete.

New event props: de_capture_mode, de_compile_gate, de_clamp_reason,
de_gate_reason, de_worker_encode, de_verify_armed, de_verify_checked,
de_verify_min_db (margin above the 32dB threshold — drift here is the
early-warning signal before fallbacks spike), de_verify_init_ms,
de_self_verify_fallback, de_fallback_reason, de_blank_suspects,
de_blank_deterministic_accepts, de_blank_recaptures, de_boundary_frames,
de_ncpr_fallbacks.

Validated end-to-end on live renders: drawelement path reports mode/verify
counters/minDb/init cost; a blur-gated comp reports mode=screenshot +
gate_reason=css_effect:filter; a forced verification failure reports
self_verify_fallback=true + fallback_reason=psnr.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

packages/cli/src/commands/render.ts

@@ -1662,6 +1662,22 @@ function trackRenderMetrics(
     staticDedupSkipReason: perf?.staticDedup?.skipReason,
     staticDedupPredictedFrames: perf?.staticDedup?.predictedFrames,
     staticDedupReusedFrames: perf?.staticDedup?.reusedFrames,
+    deCaptureMode: perf?.drawElement?.mode,
+    deCompileGate: perf?.drawElement?.compileGate,
+    deClampReason: perf?.drawElement?.clampReason,
+    deGateReason: perf?.drawElement?.gateReason,
+    deWorkerEncode: perf?.drawElement?.workerEncode,
+    deVerifyArmed: perf?.drawElement?.verifyArmed,
+    deVerifyChecked: perf?.drawElement?.verifyChecked,
+    deVerifyMinDb: perf?.drawElement?.verifyMinDb,
+    deVerifyInitMs: perf?.drawElement?.verifyInitMs,
+    deSelfVerifyFallback: perf?.drawElement?.selfVerifyFallback,
+    deFallbackReason: perf?.drawElement?.fallbackReason,
+    deBlankSuspects: perf?.drawElement?.blankSuspects,
+    deBlankDeterministicAccepts: perf?.drawElement?.blankDeterministicAccepts,
+    deBlankRecaptures: perf?.drawElement?.blankRecaptures,
+    deBoundaryFrames: perf?.drawElement?.boundaryFrames,
+    deNcprFallbacks: perf?.drawElement?.ncprFallbacks,
     compositionDurationMs,
     compositionWidth: perf?.resolution.width,
     compositionHeight: perf?.resolution.height,

packages/cli/src/telemetry/events.ts

@@ -114,6 +114,24 @@ export function trackRenderComplete(
     staticDedupSkipReason?: string;
     staticDedupPredictedFrames?: number;
     staticDedupReusedFrames?: number;
+    // drawElement fast-capture outcome (default-on release visibility).
+    // Undefined on render paths with no capture session.
+    deCaptureMode?: string;
+    deCompileGate?: string;
+    deClampReason?: string;
+    deGateReason?: string;
+    deWorkerEncode?: boolean;
+    deVerifyArmed?: number;
+    deVerifyChecked?: number;
+    deVerifyMinDb?: number;
+    deVerifyInitMs?: number;
+    deSelfVerifyFallback?: boolean;
+    deFallbackReason?: string;
+    deBlankSuspects?: number;
+    deBlankDeterministicAccepts?: number;
+    deBlankRecaptures?: number;
+    deBoundaryFrames?: number;
+    deNcprFallbacks?: number;
     // "cli" when triggered by `hyperframes render` (default), "studio" when
     // triggered by a studio preview-server render (POST /api/projects/:id/render).
     source?: "cli" | "studio";
@@ -170,6 +188,22 @@ export function trackRenderComplete(
       static_dedup_skip_reason: props.staticDedupSkipReason,
       static_dedup_predicted_frames: props.staticDedupPredictedFrames,
       static_dedup_reused_frames: props.staticDedupReusedFrames,
+      de_capture_mode: props.deCaptureMode,
+      de_compile_gate: props.deCompileGate,
+      de_clamp_reason: props.deClampReason,
+      de_gate_reason: props.deGateReason,
+      de_worker_encode: props.deWorkerEncode,
+      de_verify_armed: props.deVerifyArmed,
+      de_verify_checked: props.deVerifyChecked,
+      de_verify_min_db: props.deVerifyMinDb,
+      de_verify_init_ms: props.deVerifyInitMs,
+      de_self_verify_fallback: props.deSelfVerifyFallback,
+      de_fallback_reason: props.deFallbackReason,
+      de_blank_suspects: props.deBlankSuspects,
+      de_blank_deterministic_accepts: props.deBlankDeterministicAccepts,
+      de_blank_recaptures: props.deBlankRecaptures,
+      de_boundary_frames: props.deBoundaryFrames,
+      de_ncpr_fallbacks: props.deNcprFallbacks,
       source: props.source ?? "cli",
       composition_duration_ms: props.compositionDurationMs,
       composition_width: props.compositionWidth,