feat(curator): add archive and prune subcommands (#20200)

* fix(curator): protect hub skills by frontmatter name

* test(skill_usage): add mark_agent_created to regression test

The cherry-picked test predates #19618/#19621 which rewrote
list_agent_created_skill_names() to require an explicit
created_by: 'agent' provenance marker. Without mark_agent_created(),
my-skill is excluded from the list and the positive assertion fails.

* feat(curator): add archive and prune subcommands

Adds 'hermes curator archive <skill>' and 'hermes curator prune
[--days N] [--yes] [--dry-run]' alongside the existing status, run,
pause, resume, pin, unpin, restore, backup, rollback verbs.

These are the two genuinely new user-facing verbs requested in #19384.
The other verbs proposed there ('stats' and 'restore') already exist
as 'curator status' and 'curator restore', so no duplicate surface is
added — all skill lifecycle commands live under the single 'hermes
curator' namespace.

- archive: manual archive of an agent-created skill. Refuses pinned
  skills with a hint pointing at 'hermes curator unpin'.
- prune: bulk-archive unpinned skills idle for >= N days (default 90).
  Falls back to created_at when last_activity_at is null so never-used
  skills can still be pruned. --dry-run previews, --yes skips prompt.

Adapted from @elmatadorgh's PR #19454 which placed the same verbs
under 'hermes skills' with a separate hermes_cli/skills_config.py
handler and rich table for stats. The 'stats' and 'restore' parts of
that PR duplicated existing surface, so only archive and prune are
kept, rewritten to match hermes_cli/curator.py's existing plain-text
handler style. Tests rewritten from scratch against the new handlers.

Closes #19384

Co-authored-by: elmatadorgh <coktinbaran5@gmail.com>

---------

Co-authored-by: LeonSGP43 <cine.dreamer.one@gmail.com>
Co-authored-by: elmatadorgh <coktinbaran5@gmail.com>

scripts/release.py

@@ -268,6 +268,7 @@ AUTHOR_MAP = {
     "hakanerten02@hotmail.com": "teyrebaz33",
     "linux2010@users.noreply.github.com": "Linux2010",
     "elmatadorgh@users.noreply.github.com": "elmatadorgh",
+    "coktinbaran5@gmail.com": "elmatadorgh",
     "alexazzjjtt@163.com": "alexzhu0",
     "1180176+Swift42@users.noreply.github.com": "Swift42",
     "ruzzgarcn@gmail.com": "Ruzzgar",