Function config_for_project_analysis 

pub fn config_for_project_analysis(
    root: &Path,
    config_path: Option<&Path>,
    options: ProjectConfigOptions,
) -> EngineResult<ProjectConfig>

Resolve config for a specific analysis without depending on the CLI crate.

This mirrors the CLI’s core config semantics: explicit production overrides are applied before resolution, per-analysis production config is flattened for the requested analysis, and boundary / external plugin / rule-pack validation happens before the resolved config reaches the engine.

Errors

Returns an engine error when config loading or validation fails.