feat: get boards endpoint

repositories/board.py

@@ -0,0 +1,16 @@
+from sqlalchemy import select
+from sqlalchemy.orm import selectinload
+
+from models import Board
+from repositories.base import BaseRepository
+
+
+class BoardRepository(BaseRepository):
+    async def get_all(self, project_id: int) -> list[Board]:
+        stmt = (
+            select(Board)
+            .where(Board.is_deleted.is_(False), Board.project_id == project_id)
+            .options(selectinload(Board.statuses))
+        )
+        result = await self.session.execute(stmt)
+        return list(result.scalars().all())