refactor(app): ingest API 6변종 → 2 (ingest + ingest_with_config{IngestOpts})

summary_only를 IngestOpts에 흡수, progress/cancellable/opts 변종 제거.
재인덱싱 게이트 CHUNKS/SEARCH/ASK byte-IDENTICAL, clippy --all-targets 0.

crates/kebab-mcp/tests/tools_call_fetch.rs

@@ -44,7 +44,7 @@ async fn fetch_tool_chunk_returns_fetch_result_v1() {
         include: vec![],
         exclude: vec![],
     };
-    let _ = kebab_app::ingest_with_config(config.clone(), scope, false).unwrap();
+    let _ = kebab_app::ingest_with_config(config.clone(), scope, kebab_app::IngestOpts::default()).unwrap();
 
     let state = KebabAppState::new(config, None);
     let handler = KebabHandler::new(state);