feat(timeouts): execution timeout limits (#3120)

* feat(timeouts): execution timeout limits

* fix type issues

* add to docs

* update stale exec cleanup route

* update more callsites

* update tests

* address bugbot comments

* remove import expression

* support streaming and async paths'

* fix streaming path

* add hitl and workflow handler

* make sync path match

* consolidate

* timeout errors

* validation errors typed

* import order

* Merge staging into feat/timeout-lims

Resolved conflicts:
- stt/route.ts: Keep both execution timeout and security imports
- textract/parse/route.ts: Keep both execution timeout and validation imports
- use-workflow-execution.ts: Keep cancellation console entry from feature branch
- input-validation.ts: Remove server functions (moved to .server.ts in staging)
- tools/index.ts: Keep execution timeout, use .server import for security

* make run from block consistent

* revert console update change

* fix subflow errors

* clean up base 64 cache correctly

* update docs

* consolidate workflow execution and run from block hook code

* remove unused constant

* fix cleanup base64 sse

* fix run from block tracespan

apps/docs/content/docs/en/execution/costs.mdx

@@ -213,6 +213,25 @@ Different subscription plans have different usage limits:
 | **Team** | $40/seat (pooled, adjustable) | 300 sync, 2,500 async |
 | **Enterprise** | Custom | Custom |
 
+## Execution Time Limits
+
+Workflows have maximum execution time limits based on your subscription plan:
+
+| Plan | Sync Execution | Async Execution |
+|------|----------------|-----------------|
+| **Free** | 5 minutes | 10 minutes |
+| **Pro** | 60 minutes | 90 minutes |
+| **Team** | 60 minutes | 90 minutes |
+| **Enterprise** | 60 minutes | 90 minutes |
+
+**Sync executions** run immediately and return results directly. These are triggered via the API with `async: false` (default) or through the UI.
+**Async executions** (triggered via API with `async: true`, webhooks, or schedules) run in the background. Async time limits are up to 2x the sync limit, capped at 90 minutes.
+
+
+<Callout type="info">
+  If a workflow exceeds its time limit, it will be terminated and marked as failed with a timeout error. Design long-running workflows to use async execution or break them into smaller workflows.
+</Callout>
+
 ## Billing Model
 
 Sim uses a **base subscription + overage** billing model: