The logs stop repeating what metrics and their own fields say (#363)

iPX logged scan_done after every scan: 921 lines a day, a fifth of the
log, nearly all "scan complete, 1 feed(s)" since scans became one or two
feeds at a time (#114). ipx_jobs_total, ipx_feed_fetches_total and
ipx_last_scan_age_seconds hold all of it. It is routine now, at debug, so
the page's log view keeps it. The dashboard's "feeds checked" series and
the prod check's check 4 read the metrics instead.

ipx-directory wrote each line's span twice, as `span` and in `spans`, and
neither added anything: a request's span repeated its method, path and
status, refresh.feeds repeated `checked`, a feed span was empty.

ipx::http stays: it repeats Caddy's access line and the span, but holds
the route pattern and ipx's own time, which the dashboard groups by.

The prod check's `status` line was the healthcheck's every 30 s; since
#218 it is only `ipx status` run by hand, and the skill says so.

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

grafana/dashboard.py

@@ -230,7 +230,7 @@ ts("Waiting", [prom('ipx_worker_queue{job="ipx"}', legend="commands for the work
                prom('max(ipx_feed_retries{job="ipx"})', ref="C", legend="feeds to retry a lookup"),
                prom('max(ipx_deadair_backlog{job="ipx"})', ref="D", legend="files for DeadAir")],
    0, w=8, desc="A queue that only grows means the worker is stuck or behind.")
-ts("Feeds checked and new items", [loki(f'sum(sum_over_time({EV} | ev="scan_done" | unwrap feeds [$__interval]))', legend="feeds checked"),
+ts("Feeds checked and new items", [prom('sum(increase(ipx_feed_fetches_total{job="ipx"}[$__interval]))', legend="feeds checked"),
                                    loki(f'sum(sum_over_time({EV} | ev="feed_done" | unwrap new [$__interval]))', ref="B", legend="new items")],
    8, w=8, bars=True, desc="Feeds that were due and fetched; the rest were skipped as not due.")
 ts("Downloads", [loki(f'sum(count_over_time({EV} | ev="download_done" [$__interval]))', legend="saved"),