add ArrayVec-backed serialized query overload; doc comments

Signed-off-by: Jason Volk <jason@zemos.net>

src/database/map/remove.rs

@@ -1,5 +1,6 @@
 use std::{convert::AsRef, fmt::Debug, io::Write};
 
+use arrayvec::ArrayVec;
 use conduit::implement;
 use serde::Serialize;
 
@@ -14,6 +15,15 @@ where
 	self.bdel(key, &mut buf);
 }
 
+#[implement(super::Map)]
+pub fn adel<const MAX: usize, K>(&self, key: &K)
+where
+	K: Serialize + ?Sized + Debug,
+{
+	let mut buf = ArrayVec::<u8, MAX>::new();
+	self.bdel(key, &mut buf);
+}
+
 #[implement(super::Map)]
 #[tracing::instrument(skip(self, buf), fields(%self), level = "trace")]
 pub fn bdel<K, B>(&self, key: &K, buf: &mut B)