feat(multiplayer,playlist): show host & renect participants

app/database/room_participated_user.py

@@ -0,0 +1,39 @@
+from datetime import UTC, datetime
+from typing import TYPE_CHECKING
+
+from sqlalchemy.ext.asyncio import AsyncAttrs
+from sqlmodel import (
+    BigInteger,
+    Column,
+    DateTime,
+    Field,
+    ForeignKey,
+    Relationship,
+    SQLModel,
+)
+
+if TYPE_CHECKING:
+    from .lazer_user import User
+    from .room import Room
+
+
+class RoomParticipatedUser(AsyncAttrs, SQLModel, table=True):
+    __tablename__ = "room_participated_users"  # pyright: ignore[reportAssignmentType]
+
+    id: int | None = Field(
+        default=None, sa_column=Column(BigInteger, primary_key=True, autoincrement=True)
+    )
+    room_id: int = Field(sa_column=Column(ForeignKey("rooms.id"), nullable=False))
+    user_id: int = Field(
+        sa_column=Column(BigInteger, ForeignKey("lazer_users.id"), nullable=False)
+    )
+    joined_at: datetime = Field(
+        sa_column=Column(DateTime(timezone=True), nullable=False),
+        default=datetime.now(UTC),
+    )
+    left_at: datetime | None = Field(
+        sa_column=Column(DateTime(timezone=True), nullable=True), default=None
+    )
+
+    room: "Room" = Relationship()
+    user: "User" = Relationship()