Function generate_context 

pub fn generate_context(
    graph: &WorkspaceGraph,
    project_name: &str,
    budget: usize,
) -> Result<ContextBundle, KdoError>

Generate a context bundle for a project within a token budget.

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1. Summary + dependency list (always included)
2. Public API signatures (functions, structs, traits)
3. Implementation details (truncated first)