Accounts the content mandates, a seed for the first person, and edits suggested by who is responsible

Every person a page names as responsible gets a Kanidm account at start
if they have none, and a mail saying they are listed as responsible for
asking that question, with the link to sign in; RESPONSIBLE_GROUP puts
them in one group. SEED_ADMIN_EMAIL invites the first person into the
most privileged group - the one whose desk may invite into the most -
once. Signed in, a responsible person may suggest a change to their
own pages; checked on the server, kept, published, and mailed to the
site's inbox.

Fixes an invite of someone new on a Kanidm with only the onboarding
account: the person is created with their address in one call, since
idm_people_on_boarding may create but not modify (it answered 403).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01GT37Z1Xtfd9pUuQtMTg6Yt

docs/operations.md

@@ -70,6 +70,8 @@ values.
 | `CONTENT_REPO`, `CONTENT_BRANCH` | the repo that is the site |
 | `KANIDM_URL`, `OAUTH2_CLIENT_ID`, `OAUTH2_CLIENT_SECRET` | sign-in |
 | `KANIDM_API_TOKEN` | invites and `grants:`; unset, neither happens |
+| `SEED_ADMIN_EMAIL`, `SEED_ADMIN_NAME`, `SEED_GROUP` | the first person in, invited once at start into the most privileged group (or `SEED_GROUP`) |
+| `RESPONSIBLE_GROUP` | the group every person a page names as `responsible` joins; they get an account at start either way |
 | `PUBLIC_URL`, `SITE_NAME` | what the site calls itself in links and mail |
 | `GITEA_API_TOKEN` | authenticated resource pulls |
 | `AUTOMATION_READ_TOKEN` | the automation KV read endpoint |