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CHG0030007

Search-svc rewrite — Elastic → Vespa

Replaces the legacy search backend. ~14k LOC change.

BU: SearchRequested by: omar.hCAB: Emergency CABSelf-rank: 7/10

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Task change requests
  • TCR0070 · Search-Eng — Cut over to Vespa cluster
Software versions
  • search-svc → 2.0.0
  • vespa → 8.300
Test results
  • unit: 2100 pass · 12 fail · 55.0% cov
  • regression: 300 pass · 22 fail