Add scaled usage metrics to per-Dandiset table - #241

Put the four scaled columns ahead of the raw metrics they are derived
from, and rename those to "Total Bytes", "Total Views", "Total
Downloads" and "Total Requests" so the two groups read distinctly.

Widen the per-Dandiset table's window (1100px -> up to 1600px, still
capped by the available width) so all ten columns fit on a wide screen
instead of scrolling horizontally.

Columns gained an optional `default_sort` flag, set on "Total Bytes":
the table sorts by the first numeric column by default, which would
otherwise have moved to "Bytes / Size" and left the table ordered
differently from the plot beside it.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013Ym6LaKiE7zjkPMfzKMzts

Replace the CLAUDE.md -> AGENTS.md symlink with a single real CLAUDE.md
holding the instructions, so there is one file rather than two names for
it. Nothing outside the changelog referenced AGENTS.md.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013Ym6LaKiE7zjkPMfzKMzts

Three additions to the per-Dandiset table:

- "Total Size" and "Total Assets" columns at the end, so the
  denominators behind the scaled metrics are visible next to them. Both
  read "--" for Dandisets missing from the content derivatives.
- An "Ignore testing dataset" checkbox that drops Dandisets 000027,
  000126 and 000717, whose usage is dominated by automated testing of
  the archive. It is remembered in the URL, applies to the table (and
  its download) rather than the plot, and is only shown in the table
  view of the archive-wide selection, the one place it means anything.
- The table now uses the full page width rather than the 1100px cap the
  other tables keep, so all twelve columns fit on a wide screen. The
  table is `width: fit-content`, so this is a ceiling, not a stretch.

The "Data" menu's "Download raw file" becomes "Download table": the
source file no longer contains what the table shows, so the download is
now built from the table itself -- same columns, same formatting, same
sort order in effect. The source file is still reachable via "View file
on GitHub".

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013Ym6LaKiE7zjkPMfzKMzts

… sort

The setting belongs with the section's other settings, so move "Ignore
testing datasets" (plural, tooltip "Hide datasets used for testing
purposes") into the per-Dandiset gear-wheel panel and stop disabling
that gear in table view -- it was disabled because everything in it was
plot-only, which is no longer true. Both entries now carry an info icon
naming the view they apply to, and the panel is titled "Settings".

Re-rendering a table also no longer discards the sort the user chose:
toggling the new setting (or the binary/decimal prefix) rebuilt the
table from scratch and snapped it back to the default column. The sort
is now remembered per container element and column set, so it survives a
re-render with new rows while a genuinely different table still starts
from its own default.

setSettingsBtnDisabled had no callers left and is removed.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013Ym6LaKiE7zjkPMfzKMzts

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013Ym6LaKiE7zjkPMfzKMzts

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013Ym6LaKiE7zjkPMfzKMzts

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013Ym6LaKiE7zjkPMfzKMzts

Add 000068, 000144, 000299, 000411 and 000470, and split the list onto
one ID per line now that it no longer fits comfortably on one.

The unit tests now derive their fixture from the list and check its
shape (six-digit IDs, no duplicates, in order) instead of restating it,
and the changelog points at the constant rather than enumerating it, so
adding an ID is a one-line change.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013Ym6LaKiE7zjkPMfzKMzts

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013Ym6LaKiE7zjkPMfzKMzts

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013Ym6LaKiE7zjkPMfzKMzts