Function ast_to_markdown 

pub fn ast_to_markdown(ast: &CellstateAst) -> String

Generate a deterministic, canonical Markdown representation of a CELLSTATE AST.

The output is a stable, round-trip friendly Markdown snapshot that serializes adapters, providers, memories, policies, injections, caches, trajectories, and agents in a deterministic order and format. Certain definition kinds (e.g., Evolution, SummarizationPolicy) are omitted.