`http.rs` hand-rolled its own `block_on` + `map_http_err`, and `secrets.rs` /
`email.rs` / `users.rs` each carried a byte-identical `runtime_err` — five
`#[allow(clippy::unnecessary_box_returns)]` across four files for one pattern.
Move `runtime_err` to `bridge.rs` beside `block_on` (single home, single allow)
and have the three bridges import it. `http.rs` now calls the shared
`bridge::block_on("http", …)` (same "http:"-prefixed error, so messages are
unchanged) and its `err` validation helper delegates to `bridge::runtime_err`.
Deletes 4 duplicate fns and 3 of the 5 allows; no behavior change (pinned by
the executor-core SDK contract tests).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
f1b480f2eb