Resolve the security-review BLOCKER and the confirmed authz/info findings on
the Confluence-writer node:
- BLOCKER (data-loss): _page_has_macros fail-OPENed (real ConfluenceClient has
no page_has_macros/ADF methods) so every live write fell through to a
wholesale storage-body PUT that drops Mermaid macros — the page-1540098
diagram-loss class. Add count_storage_macros + a real ConfluenceClient
.page_has_macros (storage-body detection); make _page_has_macros FAIL CLOSED;
and add _assert_macros_preserved as the final backstop: refuse any storage
write whose body carries fewer macros than the live page.
- AUTHZ-CONF-01: add an opt-in AGENT_TEAM_CONFLUENCE_ALLOWED_PAGE_IDS allowlist
enforced server-side before a live update (model-derived page_id).
- AUTHZ-CONF-02: stop silently picking the first accessible Confluence site;
require CONFLUENCE_CLOUD_ID when multiple resolve.
- INFO: 'applied' now fail-honest (defaults False, not True) on a missing attr.
+10 regression tests; full suite 1612 passed; ruff clean.
