Feature: Application Container coverage round 3
  Exercise remaining uncovered lines in container.py:
    - _build_stream_router (lines 117, 119)
    - _build_langgraph_bridge (lines 124, 126)
    - _build_route_bridge (lines 131, 133)
    - _lazy_register_registry_agents (lines 138, 142)
    - _build_skill_service ImportError fallback (lines 386-391, 393)
    - get_container audit_event_subscriber exception path (lines 851-857)

  Background:
    Given acncov3 a clean container state

  # -----------------------------------------------------------------
  # _build_stream_router  (lines 117, 119)
  # -----------------------------------------------------------------

  Scenario: Build stream router lazily imports and returns instance
    When acncov3 I call _build_stream_router
    Then acncov3 the result should be a ReactiveStreamRouter instance

  # -----------------------------------------------------------------
  # _build_langgraph_bridge  (lines 124, 126)
  # -----------------------------------------------------------------

  Scenario: Build langgraph bridge lazily imports and returns instance
    Given acncov3 a mock stream router
    When acncov3 I call _build_langgraph_bridge with the mock stream router
    Then acncov3 the result should be a RxPyLangGraphBridge instance
    And acncov3 the bridge should reference the mock stream router

  # -----------------------------------------------------------------
  # _build_route_bridge  (lines 131, 133)
  # -----------------------------------------------------------------

  Scenario: Build route bridge lazily imports and returns instance
    Given acncov3 a mock stream router
    And acncov3 a mock agents registry
    When acncov3 I call _build_route_bridge with the mock stream router and agents
    Then acncov3 the result should be a RouteBridge instance
    And acncov3 the route bridge should reference the mock stream router

  # -----------------------------------------------------------------
  # _lazy_register_registry_agents  (lines 138, 142)
  # -----------------------------------------------------------------

  Scenario: Lazy register registry agents calls the adapter function
    Given acncov3 a mock stream router for registration
    And acncov3 a mock route bridge for registration
    And acncov3 a mock actor registry for registration
    When acncov3 I call _lazy_register_registry_agents
    Then acncov3 register_registry_agents should have been invoked

  # -----------------------------------------------------------------
  # _build_skill_service ImportError  (lines 386-391, 393)
  # -----------------------------------------------------------------

  Scenario: Build skill service falls back to in-memory when SQLAlchemy import fails
    When acncov3 I call _build_skill_service with SQLAlchemy import blocked
    Then acncov3 the result should be an in-memory SkillService
    And acncov3 the in-memory SkillService should have no repository

  # -----------------------------------------------------------------
  # get_container audit_event_subscriber exception  (lines 851-857)
  # -----------------------------------------------------------------

  Scenario: get_container handles audit_event_subscriber exception gracefully
    Given acncov3 the container is reset
    And acncov3 audit_event_subscriber is patched to raise an error
    When acncov3 I call get_container
    Then acncov3 a valid container should be returned despite the error
    And acncov3 the container should be cached as the global singleton
