Add crypto hash of all files, perhaps to PackageArchiveEntries or another table

[joelverhagen]

Right now we only have it on some files in PackageContents table and PackageAssemblies table.

Workaround is Crc32 + file size on PackageArchiveEntries but this is not a crypto hash with all of its strength.

[joelverhagen]

Done with https://github.com/NuGet/Insights/commit/a05b7d0218837a991e26390e1a622aabe12ba821.