refactor(agent): remove memory agent, simplify runtime config system

backend/src/v1/memories/repository.py

@@ -0,0 +1,31 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, Protocol
+from uuid import UUID
+
+from sqlalchemy import select
+
+from core.db.base_repository import BaseRepository
+from models.memories import Memory
+
+if TYPE_CHECKING:
+    from sqlalchemy.ext.asyncio import AsyncSession
+
+
+class MemoriesRepositoryLike(Protocol):
+    async def get_active_memories(self, *, owner_id: UUID) -> list[Memory]: ...
+
+
+class MemoriesRepository(BaseRepository[Memory]):
+    def __init__(self, session: AsyncSession) -> None:
+        super().__init__(session=session, model=Memory)
+
+    async def get_active_memories(self, *, owner_id: UUID) -> list[Memory]:
+        stmt = (
+            select(Memory)
+            .where(Memory.owner_id == owner_id)
+            .where(Memory.status == "active")
+            .order_by(Memory.created_at.desc())
+        )
+        result = await self._session.execute(stmt)
+        return list(result.scalars().all())