~107 parts were misattributed to the Flexoptix vendor but do not exist in the
live Flexoptix catalog (FX uses dot-SKUs like S.1606.28.KD; these use dash-SKUs
like FOT-AX-200G). They polluted 'BEI FLEXOPTIX BESTELLEN' with non-orderable
phantom parts carrying name-guessed specs. Now require fx_specifications IS NOT
NULL — every suggestion is confirmed in Flexoptix's API with authoritative
datasheet specs. CX 10000-48Y6C: 801 -> 630 suggestions, all catalog-confirmed,
0 physically impossible, 0 phantoms.
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