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/providers/index.js

@@ -13,6 +13,17 @@ import * as schoolmessenger from "./schoolmessenger.js";
 import * as fortinet from "./fortinet.js";
 import * as mcgrawHill from "./mcgraw-hill.js";
 import * as localInfrastructure from "./local-infrastructure.js";
+import * as amazonAws from "./amazon-aws.js";
+import * as cloudflare from "./cloudflare.js";
+import * as sherpadesk from "./sherpadesk.js";
+import * as studyIsland from "./study-island.js";
+import * as classkick from "./classkick.js";
+import * as classdojo from "./classdojo.js";
+import * as savvas from "./savvas.js";
+import * as schoolDismissalManager from "./school-dismissal-manager.js";
+import * as smartpass from "./smartpass.js";
+import * as promethean from "./promethean.js";
+import * as razKids from "./raz-kids.js";
 
 export const providers = [
   microsoft365,
@@ -30,4 +41,15 @@ export const providers = [
   fortinet,
   mcgrawHill,
   localInfrastructure,
+  amazonAws,
+  cloudflare,
+  sherpadesk,
+  studyIsland,
+  classkick,
+  classdojo,
+  savvas,
+  schoolDismissalManager,
+  smartpass,
+  promethean,
+  razKids,
 ];