[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/unit/runtime/test_respawn_persistence.py

@@ -83,13 +83,9 @@ def test_partition_drops_terminal_and_missing_rows() -> None:
 
 
 def test_partition_restamps_last_check_to_now_to_avoid_stale_tracing_gap() -> None:
-    # F034: a persisted last_check from BEFORE the restart would make the first
-    # post-restart ``_pm_made_rule_following_retry`` audit lookup
-    # (``since = record.get("last_check")``) match a PRE-restart tracing_gap
-    # row, falsely resetting the breaker on the very first post-restart spawn —
-    # exactly when a fresh strike count should be evaluating current state.
-    # Restore must re-stamp last_check to the restore time so only post-restart
-    # tracing gaps can reset the counter.
+    # Restore must re-stamp last_check to the restore time so a pre-restart
+    # tracing_gap row can't falsely reset the breaker on the first post-restart
+    # spawn.
     tid = uuid4()
     stale_check = datetime(2026, 6, 20, tzinfo=UTC)
     rows = [_row(tid, last_check=stale_check)]
@@ -380,7 +376,7 @@ async def test_restart_midloop_continues_identically_to_no_restart() -> None:
 
 
 # --------------------------------------------------------------------------- #
-# F096 — fire-and-forget persist commit ordering
+# fire-and-forget persist commit ordering
 # --------------------------------------------------------------------------- #