Ten Day Ultimatum

Fixed

• Echo Altar interaction no longer creates an invisible Heavenly Beast immediately. The altar now owns and renders the full six-second ritual, and the boss entity is created only after the final effect completes.
• Active altar rituals reject additional Terminus Cores, and their countdown is driven by the server tick instead of competing with the altar's periodic signal tick.
• Removed delayed post-load terrain filling, surface replacement, and tree placement that made the End Land visibly generate wherever the player walked.

Changed

• The End Land now uses its own Overworld-derived native noise settings. Terrain, aquifers, bedrock, caves, rotten surface layers, and terrain height are completed by Minecraft's chunk-generation pipeline before chunks are shown.
• Crimson trees are now native configured/placed world-generation features instead of delayed Java population edits.
• Newly loaded chunk bookkeeping processes in small per-tick batches, while queued altar and village candidates no longer wait up to ten seconds before construction.
• Existing generated chunks remain unchanged; the native terrain rules apply to newly explored End Land chunks.