Separate enumeration outcome from retained facts in the native call-route
owner. Keep every available typed call with its source provider and site,
supplement incomplete kinds with inferred fallback targets, and retain
known routes when fallback fails. Per-reference unknowns take precedence
over aggregate availability; cancellation remains terminal.
Project partial routes before enumeration failures, preserve each omitted
route's relation, and include its call site in the omitted-edge identity
so distinct observations to one target cannot overwrite each other.
Remove the superseded success-only provider/result representation.
Validation: 69 focused cases plus final 30-case rerun, including nine
public SDK MCP regressions; full static/architecture, docs and discovery
checks pass. Controlled-provider source REDs reproduce both route loss
and omitted-site collisions. Real native providers remain unverified.
Closes#5073Closes#3922Closes#5128
morluto
65884350ff