feat(database): add repairSmokeAIAdviceIndexes function and corresponding tests

- Implemented repairSmokeAIAdviceIndexes to manage the unique index for fa_smoke_ai_advice.
- Added unit tests for the new function to ensure correct index recreation and validation.
- Updated AutoMigrate to include the new index repair function.

internal/database/smoke_index_migration_test.go

@@ -79,3 +79,54 @@ func TestRepairSmokeAINextSmokeIndexesKeepsCorrectIndex(t *testing.T) {
 		t.Fatalf("unmet expectations: %v", err)
 	}
 }
+
+func TestRepairSmokeAIAdviceIndexesRecreatesBrokenIndex(t *testing.T) {
+	t.Parallel()
+
+	db, mock, cleanup := newMockDB(t)
+	defer cleanup()
+
+	mock.ExpectQuery("SHOW INDEX FROM `fa_smoke_ai_advice` WHERE Key_name = \\?").
+		WithArgs("uniq_smoke_ai_advice").
+		WillReturnRows(
+			sqlmock.NewRows([]string{"Key_name", "Seq_in_index", "Column_name"}).
+				AddRow("uniq_smoke_ai_advice", 1, "uid").
+				AddRow("uniq_smoke_ai_advice", 2, "advice_date").
+				AddRow("uniq_smoke_ai_advice", 3, "prompt_version"),
+		)
+	mock.ExpectExec("ALTER TABLE `fa_smoke_ai_advice` DROP INDEX `uniq_smoke_ai_advice`").
+		WillReturnResult(sqlmock.NewResult(0, 0))
+	mock.ExpectExec("ALTER TABLE `fa_smoke_ai_advice` ADD UNIQUE KEY `uniq_smoke_ai_advice` \\(`uid`,`type`,`advice_date`,`prompt_version`\\)").
+		WillReturnResult(sqlmock.NewResult(0, 0))
+
+	if err := repairSmokeAIAdviceIndexes(db); err != nil {
+		t.Fatalf("repairSmokeAIAdviceIndexes: %v", err)
+	}
+	if err := mock.ExpectationsWereMet(); err != nil {
+		t.Fatalf("unmet expectations: %v", err)
+	}
+}
+
+func TestRepairSmokeAIAdviceIndexesKeepsCorrectIndex(t *testing.T) {
+	t.Parallel()
+
+	db, mock, cleanup := newMockDB(t)
+	defer cleanup()
+
+	mock.ExpectQuery("SHOW INDEX FROM `fa_smoke_ai_advice` WHERE Key_name = \\?").
+		WithArgs("uniq_smoke_ai_advice").
+		WillReturnRows(
+			sqlmock.NewRows([]string{"Key_name", "Seq_in_index", "Column_name"}).
+				AddRow("uniq_smoke_ai_advice", 1, "uid").
+				AddRow("uniq_smoke_ai_advice", 2, "type").
+				AddRow("uniq_smoke_ai_advice", 3, "advice_date").
+				AddRow("uniq_smoke_ai_advice", 4, "prompt_version"),
+		)
+
+	if err := repairSmokeAIAdviceIndexes(db); err != nil {
+		t.Fatalf("repairSmokeAIAdviceIndexes: %v", err)
+	}
+	if err := mock.ExpectationsWereMet(); err != nil {
+		t.Fatalf("unmet expectations: %v", err)
+	}
+}