satpass_predict envelopes carry only raw azimuth_at_aos/los/peak as
float degrees — they lack the precomputed _compass string fields that
n2yo envelopes provide. The handler read only the _compass fields,
producing empty compass directions ("→") in broadcast wire text.
Apply _azimuth_to_compass() as fallback when _compass strings are
absent, preserving the existing string-field preference for n2yo.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
