Add complete playout service, chat backend, frontend with HLS player and live chat, Docker integration with health checks, updated CHANGELOG and architecture docs

backend/chat/go.mod

@@ -0,0 +1,18 @@
+module chat
+
+go 1.23
+
+require (
+	github.com/gorilla/websocket v1.5.3
+	github.com/redis/go-redis/v9 v9.7.0
+	gorm.io/driver/sqlite v1.5.7
+	gorm.io/gorm v1.25.12
+)
+
+require (
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/mattn/go-sqlite3 v1.14.22 // indirect
+)