Possible Causes of "Service not found" Error

      Effect.provide(
        Layer.mergeAll(
          Layer.scoped(
            Connection.Connection,
            connectionLive,
          ),
          Layer.effect(
            OtherServiceWhichUseConnectionTag,
            otherServiceLive,
          ),
        ),
        // snip
      ),

interface Connection {
  query: () => Effect.Effect<never, never, Chunk.Chunk<unknown>>;
}

export const Connection = Context.Tag<Connection>("Connection");

function connectionLive(): Effect.Effect<Scope, never, Connection>