docs(session-flow): quote the on-by-default claim verbatim in observer.md

Review finding on #3354: "on by default where those gates are met" sat
between a verbatim quote and its stamp, reading as verified text without a
backing span. The page carries one ("When a session meets the requirements,
messaging is on with nothing to enable"), so the bullet now quotes it, and
the 0.33.0 changelog entry mirrors the quoted wording.

Refs #3353

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016VfnUrWAEqQsQSCRsDW751

Author: claude

plugins/session-flow/CHANGELOG.md

@@ -20,8 +20,8 @@
 - **`reference/observer.md`: corrected the SendMessage gating claim.** The findings-return channel
   previously said reaching a still-running session is "gated behind experimental agent-teams",
   which conflated two surfaces: cross-session messaging is its own feature (v2.1.224+, native
-  Windows v2.1.234+, on by default where its gates are met), and only structured team-protocol
-  messages require agent teams. The bullet now quotes and stamps the availability sentence
+  Windows v2.1.234+; per the page, once a session meets the requirements it is "on with nothing
+  to enable"), and only structured team-protocol messages require agent teams. The bullet now quotes and stamps the availability sentence
   (verified 2026-08-24) and keeps the design decision unchanged on its surviving grounds: consent,
   next-tool-round delivery latency, and the durable ledger as the crash-safe primary.
 

plugins/session-flow/reference/observer.md

@@ -125,7 +125,8 @@ config overrides — stop the live observer to re-arm with new settings.
 - **`SendMessage`** — reserved for the case where findings must reach a still-running session.
   Reaching another session is cross-session messaging, not an agent-teams surface: "Cross-session
   messaging requires Claude Code v2.1.224 or later on macOS, Linux, and WSL 2, and v2.1.234 or
-  later on native Windows", on by default where those gates are met (verified 2026-08-24 against
+  later on native Windows", and "When a session meets the requirements, messaging is on with
+  nothing to enable" (both verbatim, verified 2026-08-24 against
   <https://code.claude.com/docs/en/cross-session-messaging>; recheck trigger: a Claude Code
   changelog entry touching cross-session messaging or its availability). It stays non-default
   here on the original grounds that survive the correction: the observer cannot grant consent on