Constant MEMORY_BUDGET_REMEDY 

pub const MEMORY_BUDGET_REMEDY: &str = "raise the memory budget: Python \
ExecutionContext(memory_budget=...), Rust ExecutionContext::builder().memory_budget(MemoryBudget::new(..)?), \
CLI --memory-budget, or environment variable MOLFRAME_MEMORY_BUDGET";

The text every memory refusal appends so the caller can act on it.