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.

routes/textures/texture/[hash].js

@@ -0,0 +1,27 @@
+const express = require("express")
+const router = express.Router({ mergeParams: true })
+const path = require("node:path")
+const fs = require("node:fs")
+const { DefaultError } = require("../../../errors/errors")
+
+const TEXTURES_DIR = path.join(process.cwd(), "data", "textures")
+
+router.get("/", async (req, res, next) => {
+    try {
+        const hash = req.params.hash
+        if (!/^[a-f0-9]{64}$/i.test(hash)) {
+            throw new DefaultError(404, "Texture not found")
+        }
+
+        const subDir = hash.substring(0, 2)
+        const filePath = path.join(TEXTURES_DIR, subDir, hash)
+        if (!fs.existsSync(filePath)) {
+            throw new DefaultError(404, "Texture not found")
+        }
+        res.sendFile(filePath)
+    } catch (err) {
+        return next(err)
+    }
+})
+
+module.exports = router