CI on Gitea: cap test workers so a shared runner does not time out; tag pushes build and attach Windows, Linux and macOS installers to the Gitea release; version 1.5.0

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

vitest.config.ts

@@ -5,5 +5,7 @@ export default defineConfig({
     environment: "node",
     include: ["tests/{unit,contract,integration,live}/**/*.test.ts"],
     testTimeout: 30_000,
+    // Each worker opens its own databases; a core-count pool thrashes a shared CI machine.
+    maxWorkers: 8,
   },
 });