3003cf0df6
Hardcoded fallback TLEs had approximate orbital elements (round numbers for RAAN, arg of perigee, mean anomaly) producing pass times hours off. Return empty predictions with a clear error when CelesTrak data is not yet available. Add TLE source and satellite count to the API response. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com> Signed-off-by: Stan Grams <sjg@haxx.space>