No hashing algorithm defined for use in HtmlFormatter when HashEnricher not included

[maxtheaxe]

Given that HtmlFormatter checks ArchivingContext for the appropriate hashing algorithm, that fails when HashEnricher is not included in orchestration.yaml.

auto-archiver/src/auto_archiver/formatters/html_formatter.py

Lines 57 to 59 in e495501

	he = HashEnricher({"hash_enricher": {"algorithm": ArchivingContext.get("hash_enricher.algorithm"), "chunksize": 1.6e7}})
	if len(hd := he.calculate_hash(final_media.filename)):
	final_media.set("hash", f"{he.algorithm}:{hd}")

In such a scenario, as HashEnricher is not initiated earlier, ArchivingContext has no record of a selected algorithm (default or otherwise).

[maxtheaxe]

I'll submit a PR to fix this in a bit.