Major WifiTile reliability milestone. Normal Apple WifiTile 200 responses now preserve valid entries while supplementing only missing phone-requested BSSIDs around the effective target. The implementation keeps request-only cache data isolated, preserves protobuf unknown fields and HTTP cache semantics, uses count-only logs, and has been validated by 128 automated tests plus a 9,639-device stress fixture. Historical v0.2.6 remains available for rollback.