feat: add idempotency keys

apps/dashboard/drizzle/0033_idempotency_keys.sql

@@ -0,0 +1,12 @@
+CREATE TYPE "public"."idempotency_status" AS ENUM('pending', 'completed');--> statement-breakpoint
+CREATE TABLE "idempotency_keys" (
+	"key" text PRIMARY KEY NOT NULL,
+	"fingerprint" text NOT NULL,
+	"status" "idempotency_status" DEFAULT 'pending' NOT NULL,
+	"result" text,
+	"created_at" bigint DEFAULT (extract(epoch from now()) * 1000)::bigint NOT NULL,
+	"updated_at" bigint DEFAULT (extract(epoch from now()) * 1000)::bigint NOT NULL,
+	"expires_at" bigint NOT NULL
+);
+--> statement-breakpoint
+CREATE INDEX "idempotency_keys_expires_at_index" ON "idempotency_keys" USING btree ("expires_at");