chore(DB): import pending files

Referenced commit(s): f5c4de92eb

data/sql/updates/db_characters/2026_04_12_00.sql

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+-- DB update 2026_04_03_00 -> 2026_04_12_00
+-- Flush all respawn times to ensure a clean slate for the spawn group system.
+-- Compat-mode creatures/GOs will respawn naturally on next grid load;
+-- non-compat spawns will be handled by ProcessRespawns().
+TRUNCATE TABLE `creature_respawn`;
+TRUNCATE TABLE `gameobject_respawn`;