Wrap each adapter.connect() in asyncio.wait_for() so one platform hanging
during startup or reconnect cannot block the others. Telegram's 8-retry
connect loop (~140s worst case) previously prevented Feishu from ever
starting when Telegram was network-restricted — common for users in
regions where Telegram is blocked.
Default timeout is 30s; override via HERMES_GATEWAY_PLATFORM_CONNECT_TIMEOUT
(0 disables). Applied to both startup and the reconnect watcher so a
platform that hangs mid-retry also does not stall retries for others.
Fixes#17242
3606414ec7