style: cargo fmt --all (round 4 ingest log feature follow-up)

Phase C4 executor 의 마지막 `fix(test): clippy + fmt fixes` commit 이
test file 부분만 fmt 적용. workspace 전체 fmt 누락 발견 → cargo fmt --all
적용. 모든 import alphabetical reorder + line wrapping 정합.

추가 untracked artifact 동시 commit:
- docs/superpowers/specs/2026-05-28-v0.20-ingest-log-spec.md (491 line, ACCEPT)
- docs/superpowers/plans/2026-05-28-v0.20-ingest-log-plan.md (616 line, ACCEPT)

workspace test: 1370 passed / 0 failed / 50 ignored, ingest_log_smoke green.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

crates/kebab-app/tests/ingest_file.rs

@@ -107,5 +107,8 @@ fn ingest_file_errors_on_unsupported_extension() {
 
     let err = kebab_app::ingest_file_with_config(cfg, &docx).unwrap_err();
     assert!(err.to_string().contains("unsupported extension"), "{err}");
-    assert!(err.to_string().contains(".docx") || err.to_string().contains("docx"), "{err}");
+    assert!(
+        err.to_string().contains(".docx") || err.to_string().contains("docx"),
+        "{err}"
+    );
 }