Add proclamations api endpoint

prisma/migrations/20260318054659_make_keys_unique/migration.sql

@@ -0,0 +1,8 @@
+/*
+  Warnings:
+
+  - A unique constraint covering the columns `[key]` on the table `LicenseKey` will be added. If there are existing duplicate values, this will fail.
+
+*/
+-- CreateIndex
+CREATE UNIQUE INDEX "LicenseKey_key_key" ON "LicenseKey"("key");