refactor(agents): relocate remaining MAC-only kernel (permissions, deliverable_wait)

permissions.py (authorization Rule/Ruleset model) is consumed across all
MAC subagents + the permissions middleware, with a single external
consumer (user_tool_allowlist service) -> move to
multi_agent_chat/shared/permissions.py and repoint all 42 sites.

deliverable_wait.py (wait_for_deliverable) is used only by the podcast and
video_presentation deliverable tools -> colocate into
subagents/builtins/deliverables/.

No behavior change; import-all + permission/allowlist/deliverable unit
tests stay green.

surfsense_backend/tests/unit/agents/multi_agent_chat/middleware/checkpointed_subagent_middleware/test_parallel_self_and_middleware_gated.py

@@ -46,10 +46,10 @@ from app.agents.multi_agent_chat.main_agent.middleware.checkpointed_subagent_mid
 from app.agents.multi_agent_chat.shared.middleware.permissions.ask.request import (
     request_permission_decision,
 )
+from app.agents.multi_agent_chat.shared.permissions import Rule
 from app.agents.multi_agent_chat.subagents.shared.hitl.approvals.self_gated import (
     request_approval,
 )
-from app.agents.shared.permissions import Rule
 
 
 class _SubState(TypedDict, total=False):

surfsense_backend/tests/unit/agents/multi_agent_chat/middleware/shared/permissions/test_lc_hitl_wire.py

@@ -19,7 +19,7 @@ from typing_extensions import TypedDict
 from app.agents.multi_agent_chat.shared.middleware.permissions.ask.request import (
     request_permission_decision,
 )
-from app.agents.shared.permissions import Rule
+from app.agents.multi_agent_chat.shared.permissions import Rule
 
 
 class _State(TypedDict, total=False):

surfsense_backend/tests/unit/agents/multi_agent_chat/middleware/shared/permissions/test_permission_ask_mcp_context.py

@@ -19,8 +19,8 @@ from app.agents.multi_agent_chat.shared.middleware.permissions import (
 from app.agents.multi_agent_chat.shared.middleware.permissions.ask.payload import (
     build_permission_ask_payload,
 )
+from app.agents.multi_agent_chat.shared.permissions import Rule, Ruleset
 from app.agents.shared.feature_flags import AgentFeatureFlags
-from app.agents.shared.permissions import Rule, Ruleset
 
 
 class _NoArgs(BaseModel):

surfsense_backend/tests/unit/agents/multi_agent_chat/middleware/shared/permissions/test_subagent_owned_ruleset.py

@@ -26,8 +26,8 @@ from typing_extensions import TypedDict
 from app.agents.multi_agent_chat.shared.middleware.permissions import (
     build_permission_mw,
 )
+from app.agents.multi_agent_chat.shared.permissions import Rule, Ruleset
 from app.agents.shared.feature_flags import AgentFeatureFlags
-from app.agents.shared.permissions import Rule, Ruleset
 
 
 def _kb_style_ruleset() -> Ruleset:

surfsense_backend/tests/unit/agents/multi_agent_chat/middleware/shared/permissions/test_trusted_tool_save_on_always.py

@@ -17,8 +17,8 @@ from typing_extensions import TypedDict
 from app.agents.multi_agent_chat.shared.middleware.permissions import (
     build_permission_mw,
 )
+from app.agents.multi_agent_chat.shared.permissions import Rule, Ruleset
 from app.agents.shared.feature_flags import AgentFeatureFlags
-from app.agents.shared.permissions import Rule, Ruleset
 
 
 class _NoArgs(BaseModel):

surfsense_backend/tests/unit/agents/multi_agent_chat/subagents/shared/test_subagent_builder.py

@@ -22,11 +22,11 @@ from langchain_core.outputs import ChatGeneration, ChatResult
 from app.agents.multi_agent_chat.shared.middleware.permissions.middleware.core import (
     PermissionMiddleware,
 )
+from app.agents.multi_agent_chat.shared.permissions import Rule, Ruleset, evaluate
 from app.agents.multi_agent_chat.subagents.shared.subagent_builder import (
     pack_subagent,
 )
 from app.agents.shared.feature_flags import AgentFeatureFlags
-from app.agents.shared.permissions import Rule, Ruleset, evaluate
 
 
 class RateLimitError(Exception):

surfsense_backend/tests/unit/agents/new_chat/test_default_permissions_layering.py

@@ -27,7 +27,7 @@ from __future__ import annotations
 
 import pytest
 
-from app.agents.shared.permissions import (
+from app.agents.multi_agent_chat.shared.permissions import (
     Rule,
     Ruleset,
     aggregate_action,

surfsense_backend/tests/unit/agents/new_chat/test_desktop_safety_rules.py

@@ -10,13 +10,13 @@ from __future__ import annotations
 
 import pytest
 
-from app.agents.shared.middleware.permission import PermissionMiddleware
-from app.agents.shared.permissions import (
+from app.agents.multi_agent_chat.shared.permissions import (
     Rule,
     Ruleset,
     aggregate_action,
     evaluate_many,
 )
+from app.agents.shared.middleware.permission import PermissionMiddleware
 
 pytestmark = pytest.mark.unit
 

surfsense_backend/tests/unit/agents/new_chat/test_permission_middleware.py

@@ -5,12 +5,12 @@ from __future__ import annotations
 import pytest
 from langchain_core.messages import AIMessage, ToolMessage
 
+from app.agents.multi_agent_chat.shared.permissions import Rule, Ruleset
 from app.agents.shared.errors import CorrectedError, RejectedError
 from app.agents.shared.middleware.permission import (
     PermissionMiddleware,
     _normalize_permission_decision,
 )
-from app.agents.shared.permissions import Rule, Ruleset
 
 pytestmark = pytest.mark.unit
 

surfsense_backend/tests/unit/agents/new_chat/test_permissions.py

@@ -4,7 +4,7 @@ from __future__ import annotations
 
 import pytest
 
-from app.agents.shared.permissions import (
+from app.agents.multi_agent_chat.shared.permissions import (
     Rule,
     Ruleset,
     aggregate_action,