fix(producer): pass entryFile to renderStream handler + add debug logging

The renderStream handler was missing entryFile in createRenderJob,
causing all composition renders to fall back to index.html.

Also adds logging for staticDuration and entryFile to help diagnose
duration detection issues.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

packages/producer/src/server.ts

@@ -436,6 +436,7 @@ export function createRenderHandlers(options: HandlerOptions = {}): RenderHandle
         workers: input.workers,
         useGpu: input.useGpu,
         debug: input.debug,
+        entryFile: input.entryFile,
         logger: log,
       });
       const abortController = new AbortController();

packages/producer/src/services/renderOrchestrator.ts

@@ -398,6 +398,15 @@ export async function executeRenderJob(
     perfStages.compileOnlyMs = Date.now() - compileStart;
     writeCompiledArtifacts(compiled, workDir, Boolean(job.config.debug));
 
+    log.info("Compiled composition metadata", {
+      entryFile,
+      staticDuration: compiled.staticDuration,
+      width: compiled.width,
+      height: compiled.height,
+      videoCount: compiled.videos.length,
+      audioCount: compiled.audios.length,
+    });
+
     const composition: CompositionMetadata = {
       duration: compiled.staticDuration,
       videos: compiled.videos,
@@ -445,7 +454,10 @@ export async function executeRenderJob(
       if (composition.duration <= 0) {
         const discoveredDuration = await getCompositionDuration(probeSession);
         assertNotAborted();
+        log.info("Probed composition duration from browser", { discoveredDuration, staticDuration: compiled.staticDuration });
         composition.duration = discoveredDuration;
+      } else {
+        log.info("Using static duration from data-duration attribute", { duration: composition.duration });
       }
 
       // Resolve unresolved composition durations via window.__timelines