fix: cleanup fifo before creating

[not-matthias]

No description provided.

[Copilot]

Pull Request Overview

This PR adds cleanup of existing FIFOs before creating new ones in RunnerFifo::new() to prevent potential hangs caused by pre-existing FIFO files.

• Added explicit unlink calls for both RUNNER_CTL_FIFO and RUNNER_ACK_FIFO before creating them

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[Copilot]

These unlink calls are redundant. The create_fifo function already unlinks any existing FIFO on line 12 before creating a new one. Consider removing lines 35-37 to avoid code duplication.

Suggested change

	let _ = nix::unistd::unlink(RUNNER_CTL_FIFO);
	let _ = nix::unistd::unlink(RUNNER_ACK_FIFO);