feat(dir): dht only remote discovery

[tkircsi]

Closes #1972

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[codecov]

Codecov Report

❌ Patch coverage is 79.39698% with 164 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
server/routing/routing_local.go	67.4%	20 Missing and 10 partials ⚠️
server/routing/migrate_published.go	58.7%	16 Missing and 10 partials ⚠️
server/routing/advertise.go	79.0%	18 Missing and 7 partials ⚠️
server/routing/routing.go	34.3%	16 Missing and 7 partials ⚠️
server/routing/search_remote.go	87.0%	16 Missing and 5 partials ⚠️
...m/migrations/004_purge_orphaned_record_children.go	47.4%	10 Missing ⚠️
server/routing/routing_remote.go	79.2%	4 Missing and 1 partial ⚠️
reconciler/tasks/metrics/task.go	89.7%	2 Missing and 2 partials ⚠️
server/database/gorm/record.go	66.7%	2 Missing and 2 partials ⚠️
server/database/gorm/record_labels.go	84.0%	2 Missing and 2 partials ⚠️
... and 4 more

📢 Thoughts on this report? Let us know!

[csirmazbendeguz]

In the issue you mentioned that to migrate to v2, users need to delete the routing datastore directory.
Can we do this in a migration automatically?

[tkircsi]

@csirmazbendeguz Thanks! I investigated it and yes, we can. We just need to create the datastore in subdirectory where the subdir's name is the ProtocolPrefix so v2. I'll add this to this branch soon.