chore: update tend workflows (0.2.8 → 0.2.9)

[worktrunk-bot]

Regenerates the tend-*.yaml workflows with tend 0.2.9 (from 0.2.8) and moves the
max-sixty/tend/claude action pin with them.

Two changes reach the generated files:

• gh JSON reads are no longer corrupted by a forced-colour environment. The
  preflight scripts in tend-mention and tend-notifications parse gh --json
  output; when the job environment forces colour, gh writes ANSI codes into that
  piped response and the parse sees them. Both readers now run gh with
  NO_COLOR=1 and CLICOLOR_FORCE=0 — gh ranks a forced value above NO_COLOR,
  so the second variable is the one that actually settles it
  (fix: defeat a forced-colour environment in every gh reader tend#1254).
• tend-mention-relay records why it carries no pause check. Comment only: the
  relay job boots no agent, and TEND_ENABLED=false already skips the jobs that do,
  so a paused repo relays an event that then reaches nothing
  (docs(mention-relay): record why the relay carries no TEND_ENABLED check tend#1258).

The action bump also picks up the bundled-skill changes at that ref, which change
how the bot behaves rather than what the workflow files say: it now reviews a change
before the push that opens or fixes a PR (max-sixty/tend#1259), and the
running-in-ci references index is keyed by when to read each file
(max-sixty/tend#1253).

Release mechanics and tend-internal test/doc fixes in the range are omitted.

Full comparison: max-sixty/tend@0.2.8...0.2.9

.config/tend.yaml pins no model, so nothing there needed updating.

[worktrunk-bot]

The gh colour fix this bump carries (max-sixty/tend#1254) has a local sibling. .github/scripts/list-recent-runs.sh is this repo's own gh --json reader and still guards with export NO_COLOR=1 alone — the guard that fix found insufficient, since gh ranks a forced CLICOLOR_FORCE above NO_COLOR. Its gh run list --json … output feeds straight into jq -s 'add', so escape codes there fail the parse rather than degrade it.

The script is also unreferenced: git grep list-recent-runs matches nothing outside the file itself, because #1676 deleted its only consumer (claude-hourly-review-reviewers.yaml) when review-reviewers moved to the tend repo. Deleting it settles both points.

Worth doing on its own branch rather than folding in here: this PR's verifiability rests on uvx tend@0.2.9 init reproducing it byte-for-byte, and an unrelated deletion costs that.