Fix IP address not being set on sessions from localhost

The extractClientIP() function only checked proxy headers (X-Forwarded-For,
CF-Connecting-IP, etc.) which don't exist when running locally without a proxy.

Changes:
- Add clientIP field to APIContext
- Use Bun's server.requestIP() to get client IP from direct socket connection
- Update getGeoInfo() to accept fallback IP parameter
- Pass context.clientIP to getGeoInfo() in auth procedures

Now sessions will have IP address set even for local development (::1 or 127.0.0.1).

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

apps/api-server/src/context.ts

@@ -21,6 +21,8 @@ export interface APIContext {
   reqHeaders: Headers;
   /** Response headers (for setting cookies) */
   resHeaders: Headers;
+  /** Client IP address from direct connection (fallback when no proxy headers) */
+  clientIP?: string | null;
 }
 
 /**