Delete a sample type

Removes a sample type from the caller's primary group. The behaviour depends on what's still referencing the type:

• Active samples exist — the call returns 409 (Conflict); archive or delete those samples first.
• Only archived samples exist — the sample type is soft-deleted (its deleted flag is set) so the archived samples remain readable, and it can be restored later via POST /sampleTypes/{id}/restore.
• No samples reference the type — the sample type is hard-deleted along with all its meta fields and meta defaults; this is irreversible.

Returns 404 when the sample type does not exist in your group, and 403 when the caller lacks the sample-type delete permission.