Initial commit: KiraTV IPTV proxy server

Full-stack IPTV management system with Xtream Codes API compatibility,
multi-account provider fan-out, Jellyfin local library integration,
real-time dashboard, EPG support, and A/V-sync-safe stream recovery.

backend/models/__init__.py

@@ -0,0 +1,15 @@
+from .provider import ProviderAccount
+from .channel import Category, Channel, ChannelProviderMap, ContentType
+from .user import User, UserCatalogEntry
+from .epg import EpgSource
+
+__all__ = [
+    "ProviderAccount",
+    "Category",
+    "Channel",
+    "ChannelProviderMap",
+    "ContentType",
+    "User",
+    "UserCatalogEntry",
+    "EpgSource",
+]