refactor(b2): eliminate all cross-plugin imports - contracts for worker/agent_runner/workstream, declared dependency for wiki

app/plugins/builtins/automation/agent_runner.py

@@ -110,9 +110,9 @@ async def run_agent(
         try:
             from app.plugins.builtins.contracts import get_contract
             mail_contract = get_contract("mail")
-            if mail_contract and hasattr(mail_contract, "get_recent_mails"):
+            if mail_contract and hasattr(mail_contract, "Mail"):
                 from sqlalchemy import select as _select
-                from app.plugins.builtins.mail.models import Mail
+                Mail = mail_contract.Mail
                 async with factory() as db:
                     mail_q = await db.execute(
                         _select(Mail)
@@ -379,23 +379,16 @@ async def run_agent(
         komm = get_contract_registry().get("kommunikation")
         if komm:
             async with factory() as db:
-                # Find or create agent conversation room
-                from app.plugins.builtins.contracts import get_contract as _get_contract
-                _komm_contract = _get_contract("kommunikation")
-                from app.plugins.builtins.kommunikation.models import CommConversation
-                from sqlalchemy import select as sa_select
+                # Find or create agent conversation room via contract
+                # (find_locked_room_id matches create_plugin_room semantics)
                 room_title = f"Agent: {agent.name}"
-                existing = await db.execute(
-                    sa_select(CommConversation).where(
-                        CommConversation.tenant_id == agent.tenant_id,
-                        CommConversation.title == room_title,
-                        CommConversation.is_locked.is_(True),
-                        CommConversation.locked_by == "automation",
-                        CommConversation.deleted_at.is_(None),
-                    )
+                conv_id = await komm.find_locked_room_id(
+                    db=db,
+                    tenant_id=agent.tenant_id,
+                    plugin_name="automation",
+                    title=room_title,
                 )
-                conv = existing.scalar_one_or_none()
-                if not conv:
+                if not conv_id:
                     room = await komm.create_plugin_room(
                         db=db,
                         tenant_id=agent.tenant_id,
@@ -405,8 +398,6 @@ async def run_agent(
                         participant_type="agent",
                     )
                     conv_id = uuid.UUID(room["conversation_id"])
-                else:
-                    conv_id = conv.id
 
                 # Post result as message with action_card block
                 status = result_data.get("status", "unknown")