The GPS jamming data pipeline had no scheduled seed — fetch-gpsjam.mjs
existed as a standalone script but was never wired into the relay's
setInterval-based seed system. Redis key intelligence:gpsjam:v1 was
always empty, forcing the edge function to fall back to direct
gpsjam.org fetches (without lat/lon pre-computation).
Adds startGpsJamSeedLoop() that runs every 6 hours:
- Fetches manifest + CSV from gpsjam.org
- Parses H3 hex data with min-aircraft threshold
- Converts H3→lat/lon via h3-js (pre-computed for frontend)
- Classifies regions for conflict zone tagging
- Writes enriched data to Redis with 24h TTL
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