chore(site): drop Hyperfly + Brotli row from the benchmark

[eliahilse]

Drops the Hyperfly + Brotli row from the benchmark on the site. The chart now shows two Hyperfly rows: the schema-compiled layout, and the layout plus a trained dictionary.

Copy that came with it. Three route notes quoted figures that only existed as the delta against the removed row, so those sentences are gone too:

• /v1/events — "Brotli takes 39 bytes off this route… adding Brotli on top of the profiled stream makes it four bytes larger"
• /v1/orders/:id — "Brotli actually costs two bytes here rather than saving any"
• /v1/candles — "here the honest win still belongs to Brotli's 22 bytes"

The section footnote described the Hyperfly rows as "each adding one thing: schema-compiled layout, then generic compression on top of it, then a dictionary" — now the two that remain. The JSON + Brotli — edge q4 rows and the footnote's "the Brotli rows are q4" are untouched.

Also removes the profile bar kind, now unreachable, from the Row union and from globals.css.

One thing worth a look before this ships. On /v1/candles the removed row was the smallest number on the route — 362 B, against 384 B for Hyperfly Profiled. It was the one place the page showed the profile not winning, and the note called that out as the honest read. Without it the chart reads as a clean sweep. Happy to leave it as-is, just flagging that it's the row with that property.

check-types and lint pass.

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