spaceship-earth: per-host Multica PAT, root LV growth, headless Obsidian (WDWL-22)

- provision-agent-host.yml: multica_pat now comes from
  vault_multica_pats[inventory_hostname_short], one daemon-<host> token per
  host. A pre_task asserts the key exists (never prints the value) so a
  missing entry fails by host name instead of as a no_log "censored".
- provision-wong-host.yml: spaceship-earth only. Grows the root partition,
  PV and LV/filesystem with growpart + community.general.lvg/lvol;
  idempotent (second run changed=0). Then applies obsidian_headless.
- roles/obsidian_headless: Obsidian's official headless Sync client
  (obsidian-headless 0.0.14) as system user obsync under a sandboxed
  systemd unit with UMask=0077. Vault at /srv/obsidian/vault: everpure/
  and wip/ obsync-only, inbox/ granted to multica via access + default
  ACLs, vault root traverse-only. Verifies the isolation as multica.
  Sign-in to Obsidian Sync stays manual (see the role README).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ansible/roles/obsidian_headless/meta/main.yml

@@ -0,0 +1,15 @@
+---
+galaxy_info:
+  role_name: obsidian_headless
+  author: JARVIS
+  description: >-
+    Obsidian's official headless Sync client as a dedicated user under a
+    systemd unit, with per-folder isolation for other local users.
+  license: MIT
+  min_ansible_version: "2.16"
+  platforms:
+    - name: Ubuntu
+      versions:
+        - noble
+
+dependencies: []