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-store-vector/tests/common/mod.rs

@@ -49,7 +49,8 @@ use std::sync::Arc;
 pub fn require_avx_or_panic() {
     #[cfg(target_arch = "x86_64")]
     {
-        assert!(std::is_x86_feature_detected!("avx"), 
+        assert!(
+            std::is_x86_feature_detected!("avx"),
             "kb-store-vector integration test requires AVX-capable hardware; \
              host CPU lacks AVX. Run on an AVX-capable machine. \
              See crates/kb-store-vector/tests/common/mod.rs."
@@ -167,15 +168,17 @@ pub fn make_record(
     let dim = vector.len();
     let chunk_id = ChunkId(format!("{:032x}", 0x1100u32 + u32::from(chunk_idx)));
     let doc_id = DocumentId(format!("{:032x}", 0xd0c0u32 + u32::from(doc_idx)));
-    let embedding_id =
-        EmbeddingId(format!("{:032x}", 0xeeee0000u32 + u32::from(chunk_idx)));
+    let embedding_id = EmbeddingId(format!("{:032x}", 0xeeee0000u32 + u32::from(chunk_idx)));
     VectorRecord {
         chunk_id,
         embedding_id,
         vector,
         doc_id,
         text: text.to_string(),
-        heading_path: heading.iter().map(std::string::ToString::to_string).collect(),
+        heading_path: heading
+            .iter()
+            .map(std::string::ToString::to_string)
+            .collect(),
         model_id: EmbeddingModelId(model.to_string()),
         model_version: EmbeddingVersion("v1".to_string()),
         dimensions: dim,