feat(db): mesh data model — meshes, members, invites, audit log

- pgSchema "mesh" with 4 tables isolating the peer mesh domain
- Enums: visibility, transport, tier, role
- audit_log is metadata-only (E2E encryption enforced at broker/client)
- Cascade on mesh delete, soft-delete via archivedAt/revokedAt

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/public/pdfjs-images/toolbarButton-editorHighlight.svg

@@ -0,0 +1,6 @@
+<svg width="17" height="16" viewBox="0 0 17 16" fill="none" xmlns="http://www.w3.org/2000/svg">
+    <g>
+      <path fill-rule="evenodd" clip-rule="evenodd" d="M7.10918 11.66C7.24918 11.8 7.43918 11.88 7.63918 11.88C7.83918 11.88 8.02918 11.8 8.16918 11.66L14.9192 4.91C15.2692 4.57 15.4592 4.11 15.4592 3.62C15.4592 3.13 15.2692 2.67 14.9192 2.33L13.1292 0.54C12.7892 0.19 12.3292 0 11.8392 0C11.3492 0 10.8892 0.2 10.5492 0.54L3.79918 7.29C3.50918 7.58 3.50918 8.06 3.79918 8.35L4.38988 8.9407L1.40918 11.93H5.64918L6.51419 11.065L7.10918 11.66ZM7.63918 10.07L5.38918 7.82V7.81L7.8648 5.33438L10.1198 7.58938L7.63918 10.07ZM11.1805 6.52872L13.8592 3.85C13.9892 3.72 13.9892 3.52 13.8592 3.39L12.0692 1.6C11.9892 1.52 11.8892 1.5 11.8392 1.5C11.8392 1.5 11.6892 1.51 11.6092 1.59L8.92546 4.27372L11.1805 6.52872Z" fill="#000"/>
+      <path d="M0.40918 14H15.4092V16H0.40918V14Z" fill="#000"/>
+    </g>
+  </svg>