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CRITICAL: No deadlock detection - transactions can deadlock forever #145

Description

@poyrazK

Why is this an issue?

No deadlock detection mechanism. If T1 holds A wants B, T2 holds B wants A:

// No timeout, no victim selection, no wait-for graph

Both wait forever.

What is causing it?

No deadlock detection in transaction/lock system.

How can it be solved?

Implement wait-for graph or timeout-based detection.

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