feat: gamemaster

gamemaster/internal/service/membership/errors.go

@@ -0,0 +1,13 @@
+package membership
+
+import "errors"
+
+// ErrLobbyUnavailable signals that a Resolve call could not be completed
+// because the upstream Lobby service was unreachable. The cache wraps
+// `ports.ErrLobbyUnavailable` returned by the LobbyClient adapter; hot-path
+// services map this sentinel to `service_unavailable`.
+//
+// Callers branch with errors.Is. Returned only on cache miss / TTL expiry
+// when the Lobby fetch fails; cached entries are served regardless of
+// upstream availability until the TTL elapses.
+var ErrLobbyUnavailable = errors.New("membership cache: lobby unavailable")