Latency-10K Benchmark: Validation Checks

This profile adds no endpoint of its own.

It drives GET /baseline11?a=1&b=2, the baseline endpoint unchanged, so an entry subscribed to latency-10k is run through the full baseline validation suite: the arithmetic, the Content-Type, the randomized-input anti-cheat, the TCP fragmentation checks, and the exhaustive per-byte fragmentation sweep. There is no second endpoint to check.

What the profile adds is a measurement gate rather than a correctness one. rate_ratio - achieved rps over offered rps - is published with every result, and an entry that did not hold the offered rate is not comparable on CPU with one that did. See Validity on the implementation page.