Refine default orchestration flow and documentation

- Document defaults-only configuration, kernel topology override, and deprecated CLI flags in README
- Mark schema doc as deprecated per ADR-0002
- Warn that --topology/--config are ignored; adjust loader/main/context flow
- Refactor orchestrator run() to auto-select mount/apply, reuse state when already provisioned, and serialize topology via Display
- Add Callgraph/FUNCTION_LIST/ADR docs tracking the new behavior
- Derive Eq for Topology to satisfy updated CLI handling

src/types.rs

@@ -38,7 +38,7 @@ pub struct DeviceSelection {
     pub min_size_gib: u64,
 }
 
-#[derive(Debug, Clone, Copy, Serialize, Deserialize, ValueEnum)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, ValueEnum)]
 #[serde(rename_all = "snake_case")]
 #[value(rename_all = "snake_case")]
 pub enum Topology {