fix(cost): worker crash incremenental case (#3885)

Author: icecrasher321

apps/sim/lib/logs/execution/logging-session.test.ts

@@ -391,10 +391,12 @@ describe('LoggingSession completion retries', () => {
 
     await session.onBlockComplete('block-2', 'Transform', 'function', {
       endedAt: '2025-01-01T00:00:01.000Z',
-      output: { value: true },
-      cost: { total: 1, input: 1, output: 0 },
-      tokens: { input: 1, output: 0, total: 1 },
-      model: 'test-model',
+      output: {
+        value: true,
+        cost: { total: 1, input: 1, output: 0 },
+        tokens: { input: 1, output: 0, total: 1 },
+        model: 'test-model',
+      },
     })
 
     const completionPromise = session.safeComplete({ finalOutput: { ok: true } })

apps/sim/lib/logs/execution/logging-session.ts

@@ -294,11 +294,16 @@ export class LoggingSession {
       })
     )
 
-    if (!output?.cost || typeof output.cost.total !== 'number' || output.cost.total <= 0) {
+    const blockOutput = output?.output
+    if (
+      !blockOutput?.cost ||
+      typeof blockOutput.cost.total !== 'number' ||
+      blockOutput.cost.total <= 0
+    ) {
       return
     }
 
-    const { cost, tokens, model } = output
+    const { cost, tokens, model } = blockOutput
 
     this.accumulatedCost.total += cost.total || 0
     this.accumulatedCost.input += cost.input || 0