v0.39.0

• MF-1156 - refactor: extract shared domain types to domain subpackages (#1114)
• MF - 1153 - Allow OAuth login for existing users and invite-based registration when self-registration is disabled (#1154)
• MF-1179 - Polish logs and errors in MQTT handler (#1184)
• NOISSUE - Update READMEs, openapi, ENVARS (#1151)
• MF-1118 - Support thing key auth for commands (#1181)
• MF-1182 - Introduce ErrMissingAuth error (#1183)
• MF-1168 - Publish MQTT commands to corresponding NATS subject (#1178)
• MF-1177 - Fix changing scheduler frequency has no effect (#1180)
• MF-1118 - Implement machine‑to‑machine (M2M) authorization (#1132)
• MF-1092 - add per-service PageMetadata types and fix order query parameter validation (#1086)
• MF-1159 - Fix converters: message timestamp (#1167)
• NOISSUE - Add command to push individual docker images (#1157)
• NOISSUE - Update mproxy (#1158)
• NOISSUE - Fix two silent bugs in things Redis layer (#1155)
• NOISSUE - Clean up unused UI env vars and pass self-registraion flag (#1152)
• MF - 1129 - Add Group link in the group invites email (#1136)
• MF-1135 - Add thing type to Redis cache (#1137)
• NOISSUE - Don’t allow OAuth when self‑registration is off (#1134)