fix(telemetry): enable GeoIP resolution for PostHog events

posthog-node SDK defaults disableGeoip to true, preventing country/city
data from being populated despite $ip being sent. Explicitly set
disableGeoip: false to enable geographic analytics.

src/shared/posthog.ts

@@ -77,6 +77,7 @@ function createPostHogClient(
   const configuredClient = new PostHog(getPostHogApiKey(), {
     ...options,
     host: getPostHogHost(),
+    disableGeoip: false,
   })
   const sharedProperties = getSharedProperties(source)