feat: permanentid - replace sha256 by md5(30)+sha1(30)

[jdevost]

The limit for permanentid in the index is actually 60 characters. hashlib.sha256() is generating a 64-character hash.

Rather than simply truncating it, I am proposing the default algorithm to generate permanentid in the index: md5[:30]+sha1[:30]

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CDX-784

[louis-bompart]

Looks good! Thanks a bunch for your contribution :D
May I ask what made you think of using a MD5 on the 30 first char + sha1 on the same ones

[jdevost]

Looks good! Thanks a bunch for your contribution :D May I ask what made you think of using a MD5 on the 30 first char + sha1 on the same ones

Just to be clear, it's the first 30 characters of the md5 of the whole string, and the first 30 characters of the sha1 on the whole string.

I use that because that's what is used internally by our connectors.