feat(core): entry 历史附带关联 secret 密文快照，rollback 可恢复 N:N 与密文

- db: metadata_with_secret_snapshot / strip / parse 辅助
- add/update/delete/rollback 在写 entries_history 前合并快照
- rollback: 按历史快照同步 entry_secrets、更新或插入 secrets
- 满足 clippy collapsible_if

crates/secrets-core/src/service/history.rs

@@ -31,8 +31,11 @@ pub async fn run(
     let entry = resolve_entry(pool, name, folder, user_id).await?;
 
     let rows: Vec<Row> = sqlx::query_as(
-        "SELECT version, action, created_at FROM entries_history \
-         WHERE entry_id = $1 ORDER BY id DESC LIMIT $2",
+        "SELECT DISTINCT ON (version) version, action, created_at \
+         FROM entries_history \
+         WHERE entry_id = $1 \
+         ORDER BY version DESC, id DESC \
+         LIMIT $2",
     )
     .bind(entry.id)
     .bind(limit as i64)