Improve loading speed on home timeline

This commit improves the loading speed for the home timeline (and likely
other areas of the app) by employing various techniques and changes:
- Network EOSE timeout reduced from 10 seconds down to 5 seconds
- Network EOSE does not wait on relays with broken connections
- Offload HomeModel handler event processing to separate tasks to
  avoid a large backlog
- Give SubscriptionManager streamers more fine-grained EOSE signals for
  local optimization
- Only wait for Ndb EOSE on the home timeline for faster loading
- Add logging with time elapsed measurements for easier identification of
  loading problems

Signed-off-by: Daniel D’Aquino <daniel@daquino.me>

damusTests/NostrNetworkManagerTests/NostrNetworkManagerTests.swift

@@ -61,6 +61,10 @@ class NostrNetworkManagerTests: XCTestCase {
                 case .eose:
                     // End of stream, break out of the loop
                     endOfStream.fulfill()
+                case .ndbEose:
+                    continue
+                case .networkEose:
+                    continue
                 }
             }
         }