Root cause: the form-factor fallback in flexoptix-compat matched transceivers by
form factor only, ignoring speed, so a 400G OSFP port matched every OSFP module
incl. 1.6T (5686+ impossible rows across 266 switches).
- flexoptix-compat: fallback now filters transceiver speed <= switch max port
speed (derived from ports_config + stored max_speed_gbps). Prevents regeneration.
- sql/125: evidence-based effective-ceiling (stored/ports/curated) views;
flag 5811 impossible spec_match rows status=incompatible (curated rows never
touched, understated switches never false-flagged); backfill max_speed_gbps for
327 switches from ports_config; re-derive speed for 306 speed<=0 transceivers
(form-factor capped, high-confidence only). v_switch_quality_alerts is the task
list; v_switch_understated_ports surfaces switches needing datasheet enrichment.
