A stalled Jina reader request shared the overall reader-mode AbortSignal
with the downstream trafilatura/lynx/native fallbacks. When Jina hung
until the budget timer fired, the shared signal aborted and the catch
handler's signal?.throwIfAborted() re-threw before any local fallback
ran.
- Bound Jina and Parallel extract to their own per-attempt sub-budget
(REMOTE_READER_MAX_MS, capped at 10s) so a remote stall cannot consume
the whole overall reader-mode budget.
- Catch handlers now rethrow only on real userSignal cancellation, not
on remote sub-budget or overall budget expiry.
- Wrap trafilatura/lynx in their own try/catch so a subprocess failure
or abort does not skip the in-process native renderer.
- Always attempt the native renderer last: it works on already-loaded
HTML with no network or subprocess, so even an exhausted overall
budget still yields a result.
Fixes#1449
