ipx-web's spans are named for the request (#286)

Caddy named every span ipx-web, so Tempo's lists and trace view showed the
same name for each request. Caddy 2.11 takes placeholders in the span name:
now the method and path, as ipx names its own. The prod check's span list
shows a span's url.path when it has no route.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

web/CHANGELOG.md

@@ -23,6 +23,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - An OPML subscription's page lists the items of all its shows together, newest first, with the same tabs, search and sort as a show's, in place of a list of the shows; the shows are still in the folder in the feed list (#283).
 - Unless the server pays for them, Signals are turned on in Settings with your own TypeSafe key, and the Signals folder shows only once they are on (#271).
 - A Signal's dialog says how far back it reads, and that an edit reads again only what was picked out (#276).
+- Each request's span in Tempo is named for its method and path, such as `GET /api/entries`, instead of `ipx-web` for every one (#286).
 
 ## [1.1.0] - 2026-10-16