Function impact_workspace_with_codegraph 

pub async fn impact_workspace_with_codegraph(
    database_path: &Path,
    workspace: &str,
    request: &ImpactRequest,
    binary: Option<OsString>,
) -> Result<ToolEnvelope<ImpactReport>, ApplicationError>

Computes impact with optional bounded, ephemeral CodeGraph local enrichment.

Provider failures, stale indexes, missing capabilities, and truncation are converted into visible coverage degradation and can never lower the federated risk.

Errors

Returns ApplicationError for persisted graph failures or invalid impact inputs. CodeGraph operational failures degrade the report instead of failing the federated analysis.