Added the `resolveEventDTag` method to the `NostrClient` class in `js/nostr/client.js`. This method was referenced in `editVideo` and `hydrateVideoHistory` but was missing from the implementation, causing `TypeError` in tests. The implementation delegates to `getDTagValueFromTags` from `js/nostr/nip71.js`.
Co-authored-by: PR0M3TH3AN <[email protected]>