[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_intake_spawn.py

@@ -37,8 +37,8 @@ def _make_minimal_orchestrator() -> AgentOrchestrator:
     # (F071); without this the post-docker-run guard would AttributeError on
     # the constructor-skipped instance.
     orch._running = True
-    # F093: concurrent intake starts serialize on this lock; the constructor
-    # (skipped here) initializes it.
+    # Concurrent intake starts serialize on this lock; the constructor (skipped
+    # here) initializes it.
     orch._intake_spawn_lock = asyncio.Lock()
     return orch
 
@@ -572,11 +572,9 @@ class TestDeliverWhenReady:
 
 
 # ---------------------------------------------------------------------------
-# F071 — non-blocking intake spawn must not orphan a container if shutdown
-# arrives between ``docker run`` and the _instances registration. The guarded
-# wrapper runs concurrently with stop(); without a post-docker-run shutdown
-# check, the just-started container is never recorded in _instances (which
-# stop() already iterated) so nothing tears it down — a leaked container.
+# Non-blocking intake spawn must not orphan a container if shutdown arrives
+# between ``docker run`` and _instances registration: without a post-docker-run
+# shutdown check the just-started container is never recorded so leaks.
 # ---------------------------------------------------------------------------