feat(auth): extend API key authentication to tRPC endpoints (#4732)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

packages/common/src/request.ts

@@ -9,3 +9,7 @@ export const userAgent = (headers: Headers) => {
 };
 
 export type DeviceType = "console" | "mobile" | "tablet" | "smarttv" | "wearable" | "embedded" | undefined;
+
+export const ipAddressFromHeaders = (headers: Headers): string | null => {
+  return headers.get("x-forwarded-for");
+};

packages/common/src/server.ts

@@ -1,4 +1,4 @@
 export * from "./security";
 export * from "./encryption";
-export * from "./user-agent";
+export * from "./request";
 export * from "./errors";