feat(isac): link skill chips to abilities

database/schema.sql

@@ -620,11 +620,13 @@ CREATE TABLE IF NOT EXISTS os_protocol_talent_effects (
 CREATE TABLE IF NOT EXISTS skill_chip_sets (
 	id TEXT PRIMARY KEY,
 	name TEXT NOT NULL,
+	specialization_ability_id TEXT REFERENCES specialization_abilities(id),
 	active INTEGER NOT NULL DEFAULT 1 CHECK(active IN (0, 1)),
 	created_at TEXT NOT NULL,
 	updated_at TEXT NOT NULL
 );
 CREATE UNIQUE INDEX IF NOT EXISTS skill_chip_sets_name_nocase_idx ON skill_chip_sets(name COLLATE NOCASE);
+CREATE INDEX IF NOT EXISTS skill_chip_sets_ability_idx ON skill_chip_sets(specialization_ability_id,active);
 CREATE TABLE IF NOT EXISTS skill_chip_two_piece_bonuses (
 	id TEXT PRIMARY KEY,
 	skill_chip_set_id TEXT NOT NULL UNIQUE REFERENCES skill_chip_sets(id) ON DELETE CASCADE,