docs(rag): rewrite the KB docs to the real gateway verb surface

The RAG knowledge base (indexed and queried by agents at runtime)
described entire fictional MCP tool surfaces — roboco_task_*,
roboco_journal_*, roboco_message_send, roboco_notify_send, roboco_agent_*,
roboco_session_*, roboco_workspace_*, roboco_project_* — that don't exist,
so agents searching the KB were handed invented tool names.

Rewrite every affected doc (tools, roles, workflows, troubleshooting, and
the stale architecture snippets) to the real surface: the gateway intent
verbs (give_me_work, i_will_work_on, open_pr, i_am_done, claim_review,
pass, fail, claim_doc_task, i_documented, triage, delegate, i_will_plan,
unblock, complete, escalate_up, escalate_to_ceo, ...) and content tools
(commit, note(scope=...), say, dm, evidence, notify*, open_session,
channels). Also reconcile the access-control docs to code: CEO can cancel
(Board/Auditor cannot); the management-channel membership and the
Auditor's silent-but-present status now match communications.py.

docs/rag/architecture/escalation-chain.md

@@ -43,27 +43,31 @@ Cell Members → Cell PM → Main PM → Product Owner → CEO
 ## Escalation Tool
 
 ```python
-roboco_task_escalate(
+escalate_up(
     task_id="uuid-here",
     reason="Need clarification on requirements"
 )
 ```
 
-Auto-routes to your escalation target. You CANNOT choose a different target.
+Auto-routes to your escalation target. You CANNOT choose a different
+target. `escalate_up` is a PM verb (Cell PM / Main PM); cell members
+(devs, QA, documenters) signal blockers with `i_am_blocked(task_id,
+reason)`, which their Cell PM resolves.
 
-## CEO Escalation (PM Only)
+## CEO Escalation (Main PM / Board Only)
 
 ```python
-roboco_task_escalate_to_ceo(
+escalate_to_ceo(
     task_id="uuid-here",
-    notes="Major feature ready for approval"
+    reason="Major feature ready for approval"
 )
 ```
 
 Requirements:
 - Task in `awaiting_pm_review`
 - PR exists
-- Only PMs can call this
+- Only Main PM, Product Owner, or Head of Marketing can call this
+  (Cell PMs cannot — they `escalate_up` to Main PM first)
 
 ## Cannot Skip Levels