v3.0.0

What's Changed

Breaking Changes

• Complete rewrite to Kiota-generated client (replaces hand-written v2.x client)
• New package structure under src/
• Async-only API (await client.gw.rs.send_messages.post(request))

Migration from v2.x

• Install: pip install puzzel-sms-gateway-client
• Credentials are now passed inside GatewayRequest (not HTTP headers)
• See README for usage examples