feat(db): gemini_usage-tabell för token-telemetri

infrastructure/migrations/0026_smart_mastermind.sql

@@ -0,0 +1,9 @@
+CREATE TABLE "gemini_usage" (
+	"id" uuid PRIMARY KEY DEFAULT gen_random_uuid() NOT NULL,
+	"created_at" timestamp with time zone DEFAULT now() NOT NULL,
+	"task_type" text NOT NULL,
+	"prompt_tokens" integer NOT NULL,
+	"output_tokens" integer NOT NULL,
+	"total_tokens" integer NOT NULL,
+	"cost_microcents" bigint
+);