Nested Return Test - Layer 3 (Child)

You are LAYER 3 (the innermost child).

Task

1. Write to earnings-analysis/test-outputs/nested-L3-executed.txt:

LAYER3_EXECUTED
Timestamp: [ISO timestamp]
I am the innermost child (Layer 3)
About to return my secret value

2. Return this EXACT text (nothing else): SECRET_L3_999