Add files via upload

app/usecases/achievements.py

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+from __future__ import annotations
+
+import app.repositories.achievements
+from app.repositories.achievements import Achievement
+
+
+async def create(
+    file: str,
+    name: str,
+    desc: str,
+    cond: str,
+) -> Achievement:
+    achievement = await app.repositories.achievements.create(
+        file,
+        name,
+        desc,
+        cond,
+    )
+    return achievement
+
+
+async def fetch_many(
+    page: int | None = None,
+    page_size: int | None = None,
+) -> list[Achievement]:
+    achievements = await app.repositories.achievements.fetch_many(
+        page,
+        page_size,
+    )
+    return achievements