feat: mark dns address connected time on peer store

[driftluo]

What problem does this PR solve?

Mark DNS address connected time on peer store, allow it to spread across multiple nodes.

The transmission path is as follows:

• DNS address public with identify protocol

  ckb/network/src/protocols/identify/mod.rs

  Lines 520 to 530 in b44d2d2

  	}
  	});
  	self.network_state.with_peer_store_mut(|peer_store| {
  	for addr in addrs {
  	if let Err(err) = peer_store.add_addr(addr.clone(), flags) {
  	error!("IdentifyProtocol failed to add address to peer store, address: {}, error: {:?}", addr, err);
  	}
  	}
  	})
  	}

• discovery protocol will random fetch it from peer store when it had connected during last week

  ckb/network/src/protocols/discovery/mod.rs

  Lines 140 to 150 in b44d2d2

  	let max = ::std::cmp::min(MAX_ADDR_TO_SEND, count as usize);
  	if items.len() > max {
  	items = items
  	.choose_multiple(&mut rand::thread_rng(), max)
  	.cloned()
  	.collect();
  	}
  	state.addr_known.extend(items.iter());
  	let items = items

• peer store random fetch

  ckb/network/src/peer_store/peer_store_impl.rs

  Lines 206 to 210 in b44d2d2

  	pub fn fetch_random_addrs(&mut self, count: usize, required_flags: Flags) -> Vec<AddrInfo> {
  	// Get info:
  	// 1. Connected within 7 days
  	let now_ms = ckb_systemtime::unix_time_as_millis();

Check List

Tests

• Unit test
• Integration test

Release note

Title Only: Include only the PR title in the release note.