v9.0.0

What's Changed

• feat: add player timing capabilities and static-delay persistence by @chrisuthe in #35
• fix: read repeat/shuffle from controller state and add device mac_address by @chrisuthe in #36
• refactor: retire non-spec client/sync_offset in favor of set_static_delay by @chrisuthe in #38
• feat: complete controller role surface by @chrisuthe in #39
• feat: complete artwork role (multi-channel, channel-aware events, request-format) by @chrisuthe in #40
• feat: implement the color role by @chrisuthe in #41
• feat: implement the visualizer@v1 role by @chrisuthe in #42
• feat: isolate binary dispatch so a maturing visualizer fails gracefully by @chrisuthe in #43
• fix: perceptual volume curve and default goodbye reason to restart by @chrisuthe in #44
• feat: expose an external_source enter/exit API by @chrisuthe in #48
• feat: send pure operational-state changes as client/state deltas by @chrisuthe in #47
• feat: report client/state error and synchronized on pipeline error/recovery by @chrisuthe in #45
• feat: emit stream/request-format for the player role by @chrisuthe in #46
• Dev-> Main by @chrisuthe in #37
• chore: bump version to 9.0.0 by @chrisuthe in #49
• Dev by @chrisuthe in #50

Full Changelog: v8.0.0...v9.0.0