fix(test): clippy + fmt fixes for logging_roundtrip and ingest_log_smoke

* kebab-config/tests/logging_roundtrip.rs: r#"..."# → plain string
    (clippy::unnecessary_hashes).
  * kebab-app/tests/ingest_log_smoke.rs: |e| e.ok() → Result::ok,
    |s| s.as_u64() → Value::as_u64 (clippy::redundant_closure).
  * cargo fmt --all applied to pre-existing formatting drift.

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

crates/kebab-config/tests/logging_roundtrip.rs

@@ -2,18 +2,23 @@
 //
 // Integration tests for [logging] config section (v0.20.x ingest log feature).
 
-use std::path::PathBuf;
 use kebab_config::{Config, LoggingCfg};
+use std::path::PathBuf;
 
 #[derive(serde::Deserialize)]
-struct LoggingWrapper { logging: LoggingCfg }
+struct LoggingWrapper {
+    logging: LoggingCfg,
+}
 
 // Test 1: default LoggingCfg roundtrip — enabled=true, dir="{state_dir}/logs".
 #[test]
 fn logging_defaults_are_enabled_with_state_dir_placeholder() {
     let cfg = Config::defaults();
     assert!(cfg.logging.ingest_log_enabled);
-    assert_eq!(cfg.logging.ingest_log_dir, PathBuf::from("{state_dir}/logs"));
+    assert_eq!(
+        cfg.logging.ingest_log_dir,
+        PathBuf::from("{state_dir}/logs")
+    );
 }
 
 // Test 2: [logging] override — enabled=false, custom dir.
@@ -32,9 +37,7 @@ ingest_log_dir = "/tmp/custom-logs"
 // Test 3: pre-v0.20 config (no [logging] section) → LoggingCfg::default() (AC-10).
 #[test]
 fn pre_v020_config_without_logging_section_gets_defaults() {
-    let toml = r#"
-[logging]
-"#;
+    let toml = "[logging]\n";
     let w: LoggingWrapper = toml::from_str(toml).expect("parse toml with empty logging section");
     assert!(w.logging.ingest_log_enabled);
     assert_eq!(w.logging.ingest_log_dir, PathBuf::from("{state_dir}/logs"));