vendor slugs routes instead of ids

prisma/migrations/20260127213236_add_slug_to_vendor/migration.sql

@@ -0,0 +1,11 @@
+/*
+  Warnings:
+
+  - A unique constraint covering the columns `[slug]` on the table `Vendor` will be added. If there are existing duplicate values, this will fail.
+
+*/
+-- AlterTable
+ALTER TABLE "Vendor" ADD COLUMN     "slug" TEXT;
+
+-- CreateIndex
+CREATE UNIQUE INDEX "Vendor_slug_key" ON "Vendor"("slug");