Implement all vendor integrations, WAN graphs, and FortiGate health panel

- Wire up 26 vendor providers: Atlassian Statuspage API, Status.io, Instatus,
  AWS RSS feeds, Apple/Google JSON feeds, M365 Graph API, and synthetic checks
- Add 11 new providers: AWS, Cloudflare, SmartPass, School Dismissal Manager,
  SherpaDesk, Classkick, ClassDojo, Savvas, Study Island, Promethean, RAZ-Kids
- Rename Local Infrastructure → Internet (TCP check to 8.8.8.8:53)
- Add WAN throughput graph section: dual-link canvas graphs (Crown Castle +
  Comcast) polling FortiGate REST API every 30s with 30-min rolling history
- Add FortiGate health card: uptime, CPU %, memory % from FortiOS API
- Add /api/throughput and /api/fortigate-health endpoints
- Add README with setup instructions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/server.js

@@ -1,6 +1,9 @@
+import "dotenv/config";
 import express from "express";
 import cors from "cors";
 import { providers } from "./providers/index.js";
+import { startPolling as startThroughputPolling, getHistory as getThroughputHistory } from "./fortigate-throughput.js";
+import { startPolling as startHealthPolling, getHealth as getFgHealth } from "./fortigate-health.js";
 
 const app = express();
 const PORT = 3000;
@@ -22,6 +25,9 @@ function safeCheck(provider) {
     status: "unknown",
     message: `Check failed: ${err.message}`,
     lastUpdated: new Date().toISOString(),
+  })).then((result) => ({
+    url: provider.url ?? null,
+    ...result,
   }));
 }
 
@@ -46,11 +52,23 @@ app.get("/api/status", (_req, res) => {
   res.json(cachedStatuses);
 });
 
+app.get("/api/throughput", (_req, res) => {
+  res.json(getThroughputHistory());
+});
+
+app.get("/api/fortigate-health", (_req, res) => {
+  const health = getFgHealth();
+  if (!health) return res.status(503).json({ error: "Health data not yet available." });
+  res.json(health);
+});
+
 app.get("/api/health", (_req, res) => {
   res.json({ ok: true, providers: providers.length });
 });
 
 // Poll immediately, then on interval
+startThroughputPolling();
+startHealthPolling();
 await pollAll();
 setInterval(pollAll, POLL_INTERVAL);