feat: manual compact api (#1912)

* merge develop

* chore: merge develop

* fix: some cr commentx

* fix: cr comments

src/api/src/helper.rs

@@ -256,8 +256,8 @@ fn ddl_request_type(request: &DdlRequest) -> &'static str {
         Some(Expr::Alter(_)) => "ddl.alter",
         Some(Expr::DropTable(_)) => "ddl.drop_table",
         Some(Expr::FlushTable(_)) => "ddl.flush_table",
+        Some(Expr::CompactTable(_)) => "ddl.compact_table",
         None => "ddl.empty",
-        _ => unreachable!("https://github.com/GreptimeTeam/greptimedb/pull/1912"),
     }
 }