8.0.0-beta.2

• 8.0.0-beta.2
• chore: remove internal planning artifacts (docs/ is gitignored)
• refactor: Post-refactor cleanup (#4346)
• refactor: Spectrogram unification + GC leak harness + Scope lint enforcement (#4344)
• docs: add digital ocean referral link
• refactor: definePlugin: functional plugin API with scope-owned teardown; six plugins ported (#4342)
• Declarative load & viewport: per-load Scope, loadPhase/visibleRange signals, pure canvas plan, FrameScheduler (#4341)
• fix: Leak fixes across core and plugins + Scope/signal foundation (#4340)

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