fix(core): Increase timeout for workflow execution tests

[shortstacked]

Summary

• Increases the Jest timeout for run test workflows tests from the default 5s to 15s
• The retry_and_continue_on_error test executes ~46 Code node sandbox instances with retries, which intermittently exceeds the 5s default on slow CI runners

Root cause

The workflow test JSON exercises 31 nodes (15 Reset Count + 16 Retry/Continue Code nodes) with retryOnFail: true and waitBetweenTries: 10ms. Each Code node creates a JavaScriptSandbox VM context. The cumulative sandbox creation + execution time is ~3.5s locally (cold) and can exceed 5s on shared CI runners under load.

Test plan

• Verified test passes locally with new timeout
• Linting passes (biome pre-commit hook)

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[cubic-dev-ai]

No issues found across 2 files

Architecture diagram

sequenceDiagram
    participant Jest as Jest Runner
    participant Test as Workflow Test File
    participant Engine as WorkflowExecute (Core)
    participant Node as Code Node Execution
    participant Sandbox as JavaScriptSandbox (VM)

    Note over Jest,Sandbox: High-load Workflow Execution Test (retry_and_continue_on_error)

    Jest->>Test: CHANGED: Execute test block with 15s timeout (was 5s)
    Test->>Engine: execute(workflowJSON)
    
    loop For each Node in Workflow (31 total)
        Engine->>Node: run()
        
        Note over Node,Sandbox: Cumulative resource overhead
        
        Node->>Sandbox: NEW: Initialize VM context
        Node->>Sandbox: Execute JS code
        Sandbox-->>Node: Execution result
        
        alt Node fails AND retryOnFail is true
            Node->>Node: Wait (waitBetweenTries: 10ms)
            Node->>Sandbox: NEW: Re-initialize VM & re-run
            Sandbox-->>Node: Execution result
        end
        
        Node-->>Engine: nodeOutput
    end

    Note over Jest: Jest monitors elapsed time
    
    alt Total Time < 15s
        Engine-->>Test: executionResult
        Test-->>Jest: Test Passed
    else Total Time > 15s (Old behavior on slow CI)
        Jest->>Test: Terminate (Timeout Error)
    end

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[n8n-assistant]

Got released with n8n@2.11.0