Add migration script and harden module deploy SQL

- add scripts/migrate-stack.sh to export module images and sync project/storage to a remote host
  - ensure manage-modules-sql.sh applies module db-world/db-auth/db-characters and custom SmartAI fixes idempotently
  - stage AutoBalance configs with EndGameBoost disabled on every deploy
  - bump MySQL tmpfs size (MYSQL_RUNTIME_TMPFS_SIZE, default 8G) to avoid OOM/ENOSPC

scripts/sql/custom/world/2025-10-19-smartai-fixes.sql

@@ -0,0 +1,45 @@
+-- Fix SmartAI boolean parameters for action 53 (Start Waypoint) on specific creatures.
+-- This script is idempotent and can be executed multiple times safely.
+
+UPDATE smart_scripts
+SET action_param1 = 1
+WHERE source_type = 9
+  AND action_type = 53
+  AND action_param1 = 2
+  AND entryorguid IN (
+    2576200, 2658200, 2658201, 2681404, 2740900, 2741100,
+    2748001, 2762600, 2819200, 2821700, 2821701, 2830800,
+    2866500, 2866900
+  );
+
+-- Remove obsolete “Set Active” actions linked to event 12 that generate SmartAI warnings.
+DELETE FROM smart_scripts
+WHERE source_type = 0
+  AND entryorguid IN (18948, 18950, 18965, 18970, 18972, 18986)
+  AND event_type IN (11, 36)
+  AND id IN (42, 43)
+  AND action_type = 48;
+
+-- Clear dangling linked events for Dalaran Pilgrims to silence "Link Event 3" warnings.
+UPDATE smart_scripts
+SET link = 0
+WHERE source_type = 0
+  AND entryorguid IN (32596, 32597, 32598, 32600, 32601, 32602)
+  AND id = 2
+  AND link = 3;
+
+-- Remove Link Event 12 references on the Darkshore defenders to avoid fallback errors.
+UPDATE smart_scripts
+SET link = 0
+WHERE source_type = 0
+  AND entryorguid IN (18948, 18950, 18965, 18970, 18972, 18986)
+  AND id = 2
+  AND link = 12;
+
+-- Clear Link Event 6 usage for entry 31702, which produces log spam.
+UPDATE smart_scripts
+SET link = 0
+WHERE source_type = 0
+  AND entryorguid = 31702
+  AND id = 5
+  AND link = 6;