refactor: Remove Compliance SDK from admin-v2 sidebar, add new SDK modules

Remove Compliance SDK category from sidebar navigation as it is now
handled exclusively in the Compliance Admin. Add new SDK modules
(DSB Portal, Industry Templates, Multi-Tenant, Reporting, SSO) and
GCI engine components.

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

admin-v2/app/api/sdk/v1/vendors/[[...path]]/route.ts

@@ -24,14 +24,13 @@ async function proxyRequest(
       'Content-Type': 'application/json',
     }
 
-    const authHeader = request.headers.get('authorization')
-    if (authHeader) {
-      headers['Authorization'] = authHeader
-    }
-
-    const tenantHeader = request.headers.get('x-tenant-id')
-    if (tenantHeader) {
-      headers['X-Tenant-Id'] = tenantHeader
+    // Forward all relevant headers
+    const headerNames = ['authorization', 'x-tenant-id', 'x-user-id', 'x-namespace-id', 'x-tenant-slug']
+    for (const name of headerNames) {
+      const value = request.headers.get(name)
+      if (value) {
+        headers[name] = value
+      }
     }
 
     const fetchOptions: RequestInit = {