fix(FN-1537): stabilize CI workflows and fix version tests

- Update GitHub Actions workflows to use Node.js 24 (actions/setup-node@v5)
- Add private packages to .changeset/config.json ignore array
- Fix version string tests to read dynamically from package.json
- Add FN-1537 documentation to .fusion/memory.md

packages/core/src/central-core.test.ts

@@ -5,6 +5,7 @@ import { join } from "node:path";
 import { CentralCore } from "./central-core.js";
 import { NodeDiscovery } from "./node-discovery.js";
 import { NodeConnection, type ConnectionResult } from "./node-connection.js";
+import { getAppVersion } from "./app-version.js";
 import * as systemMetrics from "./system-metrics.js";
 import type {
   RegisteredProject,
@@ -1458,7 +1459,7 @@ describe("CentralCore", () => {
 
         const updated = await central.updateNodeVersionInfo(node.id, versionInfo);
 
-        expect(updated.versionInfo?.appVersion).toBe("0.1.0");
+        expect(updated.versionInfo?.appVersion).toBe(getAppVersion());
       });
 
       it("should emit node:version:updated and node:updated events", async () => {