v2.5.0

The 2.5.0 release contains the following new features:

• Adaptive Data Rate for EU_863_870 band
• Downlink Queue
• Device Descriptions
• TLS support in MQTT Client

API Changes:

• Add description to device (Handler)
• Add region to Uplink and Activation Metadata (gRPC)
• Add schedule field to Downlink Message (MQTT)

Database changes (migration):

• Implemented data migration functionality (Discovery, Networkserver, Handler)
• Add _version to all models (Discovery, Networkserver, Handler)
• Use downlink queue instead of next_downlink (Handler)

Other changes:

• Add more metadata to log messages
• Publish more event metadata to MQTT
• Publish more (error) events to MQTT
• Check arguments in ttnctl