Add validation schemas and improve texture handling

Introduces zod-based validation schemas for Minecraft and Mojang API endpoints. Refactors texture route to support hash-based file serving and removes the old static texture route. Updates database schema for player properties and adds an event to clean expired certificates. Improves ValidationError formatting, adjusts skin/cape URL construction, and adds SSRF protection for skin uploads.

schemas/mojangapi/user/profiles/[uuid]/names.js

@@ -0,0 +1,18 @@
+const z = require("zod")
+
+module.exports = {
+    GET: {
+        headers: z.object({
+            "content-type": z.string()
+                .regex(/application\/json/i, { message: "Content-Type must be application/json" })
+                .optional()
+        }),
+        params: z.object({
+            uuid: z.string().uuid({ message: "Invalid UUID format." })
+        }),
+        error: {
+            code: 204,
+            message: "No content"
+        }
+    }
+}