Function run_process_with_timeout 

pub async fn run_process_with_timeout(
    tool_name: &str,
    cmd: Command,
    source: Option<&[u8]>,
    timeout_ms: Option<u64>,
    source_len: usize,
) -> DiagramResult<Output>

Safely executes a child process, automatically managing timeouts, input piping, and memory cleanup.

Arguments

• tool_name - Human-readable name of the tool (e.g., “mmdc”, “dot”) for error messages.
• cmd - The tokio Command to execute.
• source - Optional bytes to pipe to stdin.
• timeout_ms - Optional explicit timeout; falls back to adaptive_timeout.
• source_len - Length of the source input (used for adaptive timeout and error context).