Rekor has an OOM Condition due to Unbounded gzip Decompression in Alpine APK Parsing Logic

Description The Package.Unmarshal function in pkg/types/alpine/apk.go decompresses the signature and control gzip members of an APK file into in-memory buffers without bounding the total decompressed size. The existing maxapkmetadatasize check default 1MB is only applied to individual tar entry...