feat: make logging interval configurable (#511)

Reviewed-on: https://codeberg.org/Codeberg/pages-server/pulls/511
Reviewed-by: Andreas Shimokawa <ashimokawa@noreply.codeberg.org>
Co-authored-by: crapStone <me@crapstone.dev>
Co-committed-by: crapStone <me@crapstone.dev>

server/gitea/cache.go

@@ -111,7 +111,7 @@ func (t *writeCacheReader) Read(p []byte) (n int, err error) {
 			_, _ = t.buffer.Write(p[:n])
 		}
 	}
-	return
+	return n, err
 }
 
 func (t *writeCacheReader) Close() error {