feat: add api and mcp

backend/src/utils/read/media.py

@@ -0,0 +1,29 @@
+import asyncpg
+
+from utils.read.models import MediaView
+
+_MEDIA_COLS = (
+    "id, account_id, chat_id, message_id, kind, storage_key, file_size, "
+    "mime, ttl_seconds, downloaded, extracted_text, created_at"
+)
+
+
+async def get_media(pool: asyncpg.Pool, media_id: int) -> MediaView | None:
+    row = await pool.fetchrow(
+        f"SELECT {_MEDIA_COLS} FROM media WHERE id = $1",  # noqa: S608
+        media_id,
+    )
+    return MediaView(**dict(row)) if row else None
+
+
+async def get_message_media(
+    pool: asyncpg.Pool, account_id: int, chat_id: int, message_id: int
+) -> MediaView | None:
+    row = await pool.fetchrow(
+        f"SELECT {_MEDIA_COLS} FROM media "  # noqa: S608
+        "WHERE account_id = $1 AND chat_id = $2 AND message_id = $3",
+        account_id,
+        chat_id,
+        message_id,
+    )
+    return MediaView(**dict(row)) if row else None