[sweep] strip Fxxx audit-ID tokens + trim bloated comments/docstrings + add behavior-change docs

Post-audit sweep over the 135 audit-fix commits since 19a474d3:

1. Stripped every # Fxxx: audit-ID token from comments AND every Fxxx token
   from docstring openings across 211 blocks / ~626 lines. The CEO flagged
   these twice: audit-issue IDs in code confuse future devs/agents. The
   descriptive text is preserved; only the Fxxx token is removed (and bloated
   narrative blocks trimmed to 1-3 lines keeping the one non-obvious invariant).
2. Trimmed bloated comments/docstrings to the concise standard (1-3 lines).
3. Added missing behavior-change docs for the audit-fix batch: prompts/roles
   (documenter, pr_reviewer, qa), user-facing docs (api auth, websockets,
   agent-gateway, megatask, merge-model, task-lifecycle, grok, resilience,
   conventions, panel, security, troubleshooting), and the RAG corpus (cell-pm,
   main-pm, pr-reviewer, qa roles; conventions; messaging-tools; escalation;
   megatask; task-claiming workflows).

Comment/docstring/prose ONLY — zero code-line edits (verified: the diff
contains no def/class/return/if/for/await/assignment/call lines). Gates green:
ruff format + ruff check clean, mypy clean on roboco/. The only pytest failures
are the pre-existing sync_branch tracing-decision gap (B1, 250be5c2) — not
sweep-caused and tracked separately.

tests/integration/test_notification_delivery_phantom.py

@@ -1,17 +1,8 @@
-"""F107 — Redis bus publish must be deferred until the DB commit lands.
+"""Redis bus publish must be deferred until the DB commit lands so a rollback
+drops the event (no phantom notification for a row that never became durable).
 
-`NotificationDeliveryService.deliver` historically published
-``NOTIFICATION_SENT`` to the Redis event bus *before* the caller committed
-the notification row. A commit failure (DB hiccup, constraint, asyncpg error)
-rolled the row back but left the bus event behind — connected WebSocket
-clients received a push for an id that no longer existed (a phantom
-notification). The fix defers the bus publish to the session's
-``after_commit`` so a rollback drops it; the row is durable by the time the
-event fires.
-
-These tests need a real ``AsyncSession`` (the deferral uses SQLAlchemy
-session commit/rollback events) plus a recording bus stand-in, so they are
-integration tests against the migrated Postgres test DB.
+Integration tests against the migrated Postgres DB: the deferral uses
+SQLAlchemy ``after_commit`` events and a recording bus stand-in.
 """
 
 from __future__ import annotations
@@ -129,12 +120,8 @@ async def _seed_agents_and_notification(
 async def test_deliver_does_not_publish_before_commit(
     db_session: AsyncSession, monkeypatch: pytest.MonkeyPatch
 ) -> None:
-    """The bus event must NOT fire until the session commits (F107).
-
-    Currently RED: ``deliver`` publishes immediately, so the bus is non-empty
-    before any commit — the phantom window. With the deferred-publish fix,
-    ``deliver`` only schedules; the event fires on commit.
-    """
+    """The bus event must NOT fire until the session commits — ``deliver``
+    only schedules; the event fires on commit."""
     bus = _RecordingBus()
     monkeypatch.setattr(
         "roboco.services.notification_delivery.get_event_bus", lambda: bus
@@ -152,7 +139,7 @@ async def test_deliver_does_not_publish_before_commit(
 async def test_deliver_publishes_after_commit(
     db_session: AsyncSession, monkeypatch: pytest.MonkeyPatch
 ) -> None:
-    """Commit drains the deferred publish — one event per recipient (F107)."""
+    """Commit drains the deferred publish — one event per recipient."""
     bus = _RecordingBus()
     monkeypatch.setattr(
         "roboco.services.notification_delivery.get_event_bus", lambda: bus
@@ -179,7 +166,7 @@ async def test_deliver_rollback_drops_phantom(
     db_session: AsyncSession, monkeypatch: pytest.MonkeyPatch
 ) -> None:
     """A rollback instead of commit drops the pending publish — no phantom
-    event for a row that never became durable (F107)."""
+    event for a row that never became durable."""
     bus = _RecordingBus()
     monkeypatch.setattr(
         "roboco.services.notification_delivery.get_event_bus", lambda: bus