Paragon: move module SQL to AC's data/sql/db-* layout for auto-update

AzerothCore's DBUpdater scans modules/<mod>/data/sql/db-{world,characters,auth}/
(see src/server/database/Updater/UpdateFetcher.cpp). The previous
modules/mod-paragon/sql/{world,characters}/base/ layout was non-standard
and skipped by the updater, so a fresh deploy never had Paragon tables
created automatically.

Move all five SQL files into the standard layout. Files are idempotent
(CREATE TABLE IF NOT EXISTS plus a DELETE+INSERT for the cost table)
and now apply on every dbimport / worldserver start, recorded by hash
in <db>.updates so re-runs are skipped.

Update BUILD-NATIVE.md to drop the manual mysql import section, and
document the SQL layout in the mod-paragon README.

Co-authored-by: Cursor <cursoragent@cursor.com>

modules/mod-paragon/data/sql/db-characters/base/character_paragon_currency.sql

@@ -0,0 +1,9 @@
+-- AE / TE currency storage (Paragon class progression).
+-- Apply to the *character* database (same DB as `characters`, `character_spell`, etc.).
+
+CREATE TABLE IF NOT EXISTS `character_paragon_currency` (
+    `guid` INT UNSIGNED NOT NULL COMMENT 'characters.guid',
+    `ability_essence` SMALLINT UNSIGNED NOT NULL DEFAULT '0',
+    `talent_essence` SMALLINT UNSIGNED NOT NULL DEFAULT '0',
+    PRIMARY KEY (`guid`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='mod-paragon: Ability Essence / Talent Essence';

modules/mod-paragon/data/sql/db-characters/base/character_paragon_panel_learned.sql

@@ -0,0 +1,34 @@
+-- Spells and talents learned only through Character Advancement (Lock In / .paragon learn).
+-- Apply to the character database (same as `characters`, `character_spell`, etc.).
+
+CREATE TABLE IF NOT EXISTS `character_paragon_panel_spells` (
+    `guid` INT UNSIGNED NOT NULL COMMENT 'characters.guid',
+    `spell_id` INT UNSIGNED NOT NULL,
+    PRIMARY KEY (`guid`, `spell_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+    COMMENT='mod-paragon: spells purchased via Character Advancement';
+
+CREATE TABLE IF NOT EXISTS `character_paragon_panel_talents` (
+    `guid` INT UNSIGNED NOT NULL COMMENT 'characters.guid',
+    `talent_id` SMALLINT UNSIGNED NOT NULL,
+    `rank` TINYINT UNSIGNED NOT NULL,
+    PRIMARY KEY (`guid`, `talent_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+    COMMENT='mod-paragon: talent ranks purchased via Character Advancement';
+
+-- Passive "dependent" spells that AzerothCore's `addSpell` machinery
+-- (via spell_learn_spell + SPELL_EFFECT_LEARN_SPELL) auto-grants when a
+-- panel-purchased spell is learned. We keep them learned (some are
+-- required for the parent ability to function -- e.g. Frost Fever for
+-- Icy Touch, Blood Plague for Plague Strike) but record them here so
+-- Reset Abilities / Reset Everything can unlearn them alongside the
+-- parent. Only passive auto-learns are tracked here; active dependents
+-- (Death Coil, Death Grip, ...) are revoked at learn time and never
+-- reach this table.
+CREATE TABLE IF NOT EXISTS `character_paragon_panel_spell_children` (
+    `guid` INT UNSIGNED NOT NULL COMMENT 'characters.guid',
+    `parent_spell_id` INT UNSIGNED NOT NULL COMMENT 'character_paragon_panel_spells.spell_id',
+    `child_spell_id` INT UNSIGNED NOT NULL COMMENT 'auto-learned passive spell id',
+    PRIMARY KEY (`guid`, `parent_spell_id`, `child_spell_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
+    COMMENT='mod-paragon: passive auto-learn dependents to unlearn on reset';