Unify service accounts to one kind, add manager field, make homeDirectory/loginShell editable

Removes the LDAP bind-only service account type in favor of a single
Unix/POSIX account model, surfaced in a new Users > Service Accounts tab.
Adds a multi-valued `manager` field to every account (defaults to the
creator, editable, and grants edit rights on the accounts a person manages
without needing app_sso_admin). homeDirectory and loginShell are now
editable from the profile edit form.

Bumps to v1.1.7.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KDEx8ghuZR61pqPXc6da9C

nodejs/app.js

@@ -82,7 +82,6 @@ app.use('/api/user', middleware.auth, require('./routes/user'));
 app.use('/api/token', middleware.auth, require('./routes/token'));
 
 app.use('/api/group', middleware.auth, require('./routes/group'));
-app.use('/api/service-account', middleware.auth, require('./routes/service_account'));
 app.use('/api/notification', middleware.auth, require('./routes/notification'));
 app.use('/api/update-check', middleware.auth, require('./routes/update_check'));
 app.use('/api/tos', middleware.auth, require('./routes/tos'));