fix: backwards compatibility fixes with older firmware versions.

- Inject `cosock.bus` if it doesn't exist.
- Spawn the SSDP task during driver startup on versions that don't
  support the startup state handler, where it is normally spawned.

Author: dljsjr

drivers/SmartThings/sonos/src/init.lua

@@ -1,3 +1,11 @@
+local api_version = require("version").api
+local cosock = require "cosock"
+
+if type(cosock.bus) == "nil" then
+  local cosock_bus = require "cosock.bus"
+  cosock.bus = cosock_bus
+end
+
 ---@module 'result'
 require "result" {
   register_globals = true,
@@ -22,6 +30,15 @@ if driver.datastore["dni_to_device_id"] ~= nil then
   driver.datastore["dni_to_device_id"] = nil
 end
 
+-- API Version 14 was the version that came out with 0.57.x
+--
+-- In API >= 14, the SSDP task will start when the driver receives the startup state.
+-- To support older versions of hub core, we start the SSDP task before the run loop,
+-- where we won't be using the startup state handling.
+if api_version < 14 then
+  driver:start_ssdp_event_task()
+end
+
 log.info "Starting Sonos run loop"
 driver:run()
 log.info "Exiting Sonos run loop"

drivers/SmartThings/sonos/src/sonos_driver.lua

@@ -296,6 +296,7 @@ end
 ---@return { accessToken: string, expiresAt: number }? the token if a currently valid token is available, nil if not
 ---@return "token expired"|"no token"|nil reason the reason a token was not provided, nil if there is a valid token available
 function SonosDriver:get_oauth_token()
+  self.hub_augmented_driver_data = self.hub_augmented_driver_data or {}
   local decode_success, maybe_token =
     pcall(json.decode, self.hub_augmented_driver_data.sonosOAuthToken)
   if