feat: integrate nostrdb relay indexing

- Upgrade `nostrdb` to v0.6.1 with relay metadata support
- Switch to `nostr::RelayUrl` for typed relay URLs
- Use `process_event_with()` to pass relay info during ingestion
- Update `Relay`, `RelayPool`, and unknown ID logic accordingly

This enables richer indexing with relay provenance in events.

Signed-off-by: William Casarin <jb55@jb55.com>

crates/notedeck/Cargo.toml

@@ -12,6 +12,7 @@ strum = { workspace = true }
 strum_macros = { workspace = true }
 dirs = { workspace = true }
 enostr = { workspace = true }
+nostr = { workspace = true }
 egui = { workspace = true }
 eframe = { workspace = true }
 image = { workspace = true }

crates/notedeck/src/unknowns.rs

@@ -5,6 +5,7 @@ use crate::{
 };
 
 use enostr::{Filter, NoteId, Pubkey};
+use nostr::RelayUrl;
 use nostrdb::{BlockType, Mention, Ndb, Note, NoteKey, Transaction};
 use std::collections::{HashMap, HashSet};
 use std::time::{Duration, Instant};
@@ -78,8 +79,6 @@ impl SingleUnkIdAction {
     }
 }
 
-type RelayUrl = String;
-
 /// Unknown Id searcher
 #[derive(Default, Debug)]
 pub struct UnknownIds {
@@ -300,7 +299,7 @@ pub fn get_unknown_note_ids<'a>(
                     let id = UnknownId::Pubkey(Pubkey::new(*nprofile.pubkey()));
                     let relays = nprofile
                         .relays_iter()
-                        .map(String::from)
+                        .filter_map(|s| RelayUrl::parse(s).ok())
                         .collect::<HashSet<RelayUrl>>();
                     ids.entry(id).or_default().extend(relays);
                 }
@@ -308,7 +307,7 @@ pub fn get_unknown_note_ids<'a>(
             Mention::Event(ev) => {
                 let relays = ev
                     .relays_iter()
-                    .map(String::from)
+                    .filter_map(|s| RelayUrl::parse(s).ok())
                     .collect::<HashSet<RelayUrl>>();
                 match ndb.get_note_by_id(txn, ev.id()) {
                     Err(_) => {