docs: Add Oracle Cloud (OCI) platform guide (#2333)

* docs: Add Oracle Cloud (OCI) platform guide

- Add comprehensive guide for Oracle Cloud Always Free tier (ARM)
- Cover VCN security, Tailscale Serve setup, and why traditional hardening is unnecessary
- Update vps.md to list Oracle as top provider option
- Update digitalocean.md to link to official Oracle guide instead of community gist

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* Keep community gist link, remove unzip

* Fix step order: lock down VCN after Tailscale is running

* Move VCN lockdown to final step (after verifying everything works)

* docs: make Oracle/Tailscale guide safer + tone down DO copy

* docs: fix Oracle guide step numbering

* docs: tone down VPS hub Oracle blurb

* docs: add Oracle Cloud guide (#2333) (thanks @hirefrank)

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: Pocket Clawd <pocket@Pockets-Mac-mini.local>

src/discord/monitor/presence-cache.test.ts

@@ -1,11 +1,6 @@
 import { beforeEach, describe, expect, it } from "vitest";
 import type { GatewayPresenceUpdate } from "discord-api-types/v10";
-import {
-  clearPresences,
-  getPresence,
-  presenceCacheSize,
-  setPresence,
-} from "./presence-cache.js";
+import { clearPresences, getPresence, presenceCacheSize, setPresence } from "./presence-cache.js";
 
 describe("presence-cache", () => {
   beforeEach(() => {