fix(stats): better stat table periods, provider/model norm

Author: adamdotdevin

packages/stats/core/migrations/20260528012726_worthless_ultimo/migration.sql

@@ -0,0 +1,5 @@
+ALTER TABLE `geo_stat` ADD `provider` varchar(128) DEFAULT 'all' NOT NULL;--> statement-breakpoint
+ALTER TABLE `geo_stat` ADD `model` varchar(256) DEFAULT 'all' NOT NULL;--> statement-breakpoint
+ALTER TABLE `geo_stat` DROP INDEX `uniq_country_period`;--> statement-breakpoint
+CREATE UNIQUE INDEX `uniq_country_period` ON `geo_stat` (`grain`,`period_start`,`dataset`,`tier`,`client`,`source`,`provider`,`model`,`country`);--> statement-breakpoint
+CREATE INDEX `idx_country_model` ON `geo_stat` (`model`,`country`,`grain`,`period_start`);