feat(platform): Add endpoint for serving Sentry ip-ranges (#13819)

This PR adds a new API endpoint that serves Sentry's IP ranges in JSON
format.

- Added new API endpoint at `api/ip-ranges`
- Implemented structured JSON response with IP ranges organized by
category:
  - Dashboard and API IPs
  - Event Ingestion IPs
  - Outbound Requests IPs
  - Email Delivery IPs
  - Uptime Monitoring IPs
- Added security headers and caching (12 hours)

cc @bruno-garcia lmk if that works for you

Author: chargome

app/api/ip-ranges/ip-ranges.json

@@ -0,0 +1,62 @@
+{
+  "data": {
+    "dashboard": {
+      "sentry_io": [
+        "35.186.247.156/32"
+      ],
+      "us_sentry_io": [
+        "35.186.247.156/32"
+      ],
+      "de_sentry_io": [
+        "34.36.122.224/32",
+        "34.36.87.148/32"
+      ]
+    },
+    "event_ingestion": {
+      "apex_domain": [
+        "35.186.247.156/32"
+      ],
+      "organization_subdomains": {
+        "us": [
+          "34.120.195.249/32"
+        ],
+        "eu": [
+          "34.120.62.213/32",
+          "130.211.36.74/32"
+        ]
+      },
+      "legacy": [
+        "34.96.102.34/32"
+      ]
+    },
+    "outbound_requests": {
+      "us": [
+        "35.184.238.160/32",
+        "104.155.159.182/32",
+        "104.155.149.19/32",
+        "130.211.230.102/32"
+      ],
+      "eu": [
+        "34.141.31.19/32",
+        "34.141.4.162/32",
+        "35.234.78.236/32"
+      ]
+    },
+    "email_delivery": [
+      "167.89.86.73",
+      "167.89.84.75",
+      "167.89.84.14"
+    ],
+    "uptime_monitoring": [
+      "34.123.33.225",
+      "34.41.121.171",
+      "34.169.179.115",
+      "35.237.134.233",
+      "34.85.249.57",
+      "34.159.197.47",
+      "35.242.231.10",
+      "34.107.93.3",
+      "35.204.169.245"
+    ]
+  }
+}

app/api/ip-ranges/route.ts

@@ -0,0 +1,17 @@
+// these ranges are a copy of docs/security-legal-pii/security/ip-ranges.mdx
+import ipRanges from './ip-ranges.json';
+
+// 12h
+const CACHE_DURATION = 12 * 60 * 60;
+
+export function GET() {
+  const headers = new Headers({
+    'Content-Type': 'application/json',
+    'Cache-Control': `public, max-age=${CACHE_DURATION}`,
+    'X-Content-Type-Options': 'nosniff',
+    'X-Frame-Options': 'DENY',
+    'X-XSS-Protection': '1; mode=block',
+  });
+
+  return Response.json(ipRanges, {status: 200, headers});
+}