docs(maestro): fix two more factual errors in structured docs

INSTALL.md conflated event-log replay with ACP session/load resume.
STRUCTURED-VIEW.md overstated death-on-append-failure: only notification
appends kill the session, approval-row append failures just cancel the
pending approval.

docs/STRUCTURED-VIEW.md

@@ -312,8 +312,11 @@ directory: the sidecar itself (`<id>.json`), plus two next to it:
 Three ways a structured session ends up `Dead`, each with different
 persistence consequences:
 
-1. **The adapter exits, or the log append fails, while the daemon keeps
-   running.** `mark_session_dead` applies the same natural-exit worktree rule
+1. **The adapter exits, or a notification append to the event log fails,
+   while the daemon keeps running.** (An approval-row append failure is
+   narrower: it cancels the pending approval and lets the session continue,
+   without marking it dead.) `mark_session_dead` applies the same
+   natural-exit worktree rule
    as a terminal session's own pane exiting (`docs/WORKTREES.md`): a pristine
    worktree is removed, one holding unsaved work is left on disk. No recovery
    marker is written. This death is permanent — a later daemon restart's