I don't have anywhere near the background to fully understand the concept, and maybe this is a question that comes from reading too much sci-fi (or focuses too much on a practical question of a still very theoretical proposal), but isn't one of the main concerns with relativistic spaceflight the intense amount of energy which would be discharged by a collision with atomic or molecular elements of the interstellar medium?
Are there any other proposals out there today which address the risk of travelling through the interstellar medium at a high percentage of c?
Technically the UN declaration is not legally binding, so there is no legal conflict.
Of course, that isn't meant to say that the declaration shouldn't be respected or that a government/nation might not face backlash for failing to respect it, but in a Canadian court I believe (IANAL) that the UN declaration would be effectively irrelevant.
Edit: I made this comment before reading the article; it appears BC has actually passed legislation requiring them to implement UNDRIP (https://declaration.gov.bc.ca/), so the parent's question remains valid.
Aren't Spotify deals typically coming from the record companies themselves, not the musicians? Unless artists reject the current record company model, Spotify isn't going to be able to fix this problem for them.
Liquibase is pretty solid, my company has used it across a couple of projects. Similar to your Flyway experience, it's not anything particularly amazing but it works.
Are there any other proposals out there today which address the risk of travelling through the interstellar medium at a high percentage of c?