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-chunk/tests/dockerfile_file_v1.rs

@@ -124,7 +124,11 @@ fn dockerfile_emits_single_chunk() {
                 Some("<dockerfile>"),
                 "symbol must be '<dockerfile>'"
             );
-            assert_eq!(lang.as_deref(), Some("dockerfile"), "lang must be 'dockerfile'");
+            assert_eq!(
+                lang.as_deref(),
+                Some("dockerfile"),
+                "lang must be 'dockerfile'"
+            );
         }
         other => panic!("expected SourceSpan::Code, got {other:?}"),
     }