The always-rebuild approach caused the CTA to disappear when the observer
fired a second time. Reverted to only rebuild on FRN change.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Always rebuild CTA when observer fires (removes stale CTA first)
- Check both label and full card text for service detection
- Add dedup guards on service list
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>