feat: auto-inject Odoo workflow context into every agent execution

BaseAgent._lookup_odoo_context() calls odoo_doc_agent via PeerBus before
_plan() runs on every directive. The RAG answer is stored in
self._gathered['odoo_context'] and injected into every _loop() LLM call
so agents reason with correct Odoo 18 workflow steps automatically.

No changes required to individual agents. odoo_doc_agent opts out via
auto_rag=False to prevent self-referential calls.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

agent_service/agents/odoo_doc_agent.py

@@ -30,6 +30,7 @@ class OdooDocAgent(BaseAgent):
     required_odoo_module = 'base'
     system_prompt_file = ''
     tools = []
+    auto_rag = False  # prevent self-referential PeerBus calls
 
     async def _plan(self) -> dict:
         return {