docs: two of the three remaining readers are traps, not ready work

The "what is left" list named `kernel_params` and `interconnect` as readers that
answer here and merely lack a schema. Both were read before declaring anything,
and neither is ready.

`interconnect` measures nothing. `infer_topology` matches on the CPU marketing
name -- `name.contains("GRANITE")` -- and returns hardcoded constants; the
bandwidth figures are arithmetic over those constants and the latency field's
own comment says "estimated". It is the withheld-score defect again, except
`bandwidth_gbs` reads as a measurement in a way `score` does not.

`kernel_params` mixes real sysctl reads with this crate's opinion about what the
values ought to be -- exactly what `simon tune`'s standing rule forbids
publishing as fact.

The generalisation, now that this shape has appeared three times: a reader
returning rows on this machine has cleared the availability bar and nothing
else. Whether each field is a reading is a separate question, and a plausible
unit is not evidence.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>