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-cli/tests/cli_empty_query.rs

@@ -1,15 +1,18 @@
 //! Integration tests for Bug #14: empty or whitespace-only query must emit
 //! error.v1 code=invalid_input and exit nonzero (not silent 0-hit return).
 
-use std::process::Command;
 use serde_json::Value;
+use std::process::Command;
 
 fn kebab_bin() -> String {
     env!("CARGO_BIN_EXE_kebab").to_string()
 }
 
 fn parse_error_v1(stderr: &str) -> Value {
-    let last = stderr.lines().last().expect("expected error.v1 ndjson on stderr");
+    let last = stderr
+        .lines()
+        .last()
+        .expect("expected error.v1 ndjson on stderr");
     serde_json::from_str(last)
         .unwrap_or_else(|e| panic!("expected ndjson on stderr: {e}\nstderr={stderr}"))
 }