refactor for stronger RawPduId type

implement standard traits for PduCount

enable serde for arrayvec

typedef various shortid's

pducount simplifications

split parts of pdu_metadata service to core/pdu and api/relations

remove some yields; improve var names/syntax

tweak types for limit timeline limit arguments

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

src/core/pdu/id.rs

@@ -0,0 +1,22 @@
+use super::{PduCount, RawPduId};
+use crate::utils::u64_from_u8x8;
+
+pub type ShortRoomId = ShortId;
+pub type ShortEventId = ShortId;
+pub type ShortId = u64;
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub struct PduId {
+	pub shortroomid: ShortRoomId,
+	pub shorteventid: PduCount,
+}
+
+impl From<RawPduId> for PduId {
+	#[inline]
+	fn from(raw: RawPduId) -> Self {
+		Self {
+			shortroomid: u64_from_u8x8(raw.shortroomid()),
+			shorteventid: PduCount::from_unsigned(u64_from_u8x8(raw.shorteventid())),
+		}
+	}
+}