fix(i-e): BUG-099 geschlossen — tote workstream-Tests entfernt, Import-Test korrigiert

app.ai.agent_workstream und app.workflows.workstream sind geloescht (Phase-2-Roadmap); lazy Imports brachen zur Laufzeit. Chirurgische Entfernung: TestWorkstream-Klasse phase_f (120 Zeilen), TestWorkflowWorkstream + G-WORK-Sektion phase_g (73 Zeilen), test_workstream_to_task_transition spike_i.

test_all_modules_importable auf existierende Exporte korrigiert (fetch_source_content->get_available_sources, auto_create_relationships->filter_high_confidence); alle anderen Module via importlib-Check verifiziert OK. ruff: 21 Findings auto-gefixt, 1 F841-Vorbestand belassen.

Beweis: phase_f+phase_g+spike_i 88/88 passed in 19.16s; to_workstream_block()-Tests bleiben valide (existiert in app.ai.knowledge_sources).

tests/test_phase_g_workflows.py

@@ -5,7 +5,6 @@ All tests use mocks — no real DB/LLM/Redis/HTTP needed.
 
 from __future__ import annotations
 
-import asyncio
 import uuid
 from datetime import UTC, datetime, timedelta
 from unittest.mock import AsyncMock, MagicMock, patch
@@ -14,12 +13,11 @@ import pytest
 
 from app.workflows.step_handlers import (
     StepResult,
-    get_step_handler,
-    get_available_step_types,
     _is_url_safe,
+    get_available_step_types,
+    get_step_handler,
 )
 
-
 # ─── Step Handler Registry ────────────────────────────────────────────────────
 
 
@@ -308,7 +306,6 @@ class TestWorkflowEngineResume:
     async def test_find_resumable_workflows_query(self):
         """find_resumable_workflows queries for waiting instances with passed resume_at."""
         from app.workflows.engine import find_resumable_workflows
-        from app.models.workflow import WorkflowInstance
 
         db = MagicMock()
         mock_result = MagicMock()
@@ -335,9 +332,10 @@ class TestWorkflowSchema:
 
     def test_step_schema_rejects_unknown_type(self):
         """WorkflowStep schema rejects unknown step types."""
-        from app.schemas.workflow import WorkflowStep
         from pydantic import ValidationError
 
+        from app.schemas.workflow import WorkflowStep
+
         with pytest.raises(ValidationError):
             WorkflowStep(name="Bad", type="unknown_type", config={})
 
@@ -464,75 +462,3 @@ class TestDecisionGuard:
         assert "send_email" in result["reason"]
 
 
-# ─── G-WORK: Workflow Workstream ─────────────────────────────────────────────
-
-
-class TestWorkflowWorkstream:
-    """Test the workflow workstream integration (G-WORK)."""
-
-    @pytest.mark.asyncio
-    async def test_post_workflow_status_fallback_to_notification(self):
-        """post_workflow_status falls back to system notification when CommContract unavailable."""
-        from app.workflows.workstream import post_workflow_status
-
-        with patch("app.core.notifications.post_system_message", new_callable=AsyncMock):
-            result = await post_workflow_status(
-                db=MagicMock(),
-                tenant_id=uuid.uuid4(),
-                instance_id=uuid.uuid4(),
-                workflow_name="Test Workflow",
-                status="in_progress",
-                user_id=uuid.uuid4(),
-            )
-            # Should return None (fallback) but not crash
-            assert result is None
-
-    @pytest.mark.asyncio
-    async def test_post_workflow_error_fallback_to_notification(self):
-        """post_workflow_error falls back to system notification."""
-        from app.workflows.workstream import post_workflow_error
-
-        with patch("app.core.notifications.post_system_message", new_callable=AsyncMock):
-            result = await post_workflow_error(
-                db=MagicMock(),
-                tenant_id=uuid.uuid4(),
-                instance_id=uuid.uuid4(),
-                workflow_name="Test Workflow",
-                error="Something went wrong",
-                user_id=uuid.uuid4(),
-            )
-            assert result is None
-
-    @pytest.mark.asyncio
-    async def test_post_workflow_completed_fallback_to_notification(self):
-        """post_workflow_completed falls back to system notification."""
-        from app.workflows.workstream import post_workflow_completed
-
-        with patch("app.core.notifications.post_system_message", new_callable=AsyncMock):
-            result = await post_workflow_completed(
-                db=MagicMock(),
-                tenant_id=uuid.uuid4(),
-                instance_id=uuid.uuid4(),
-                workflow_name="Test Workflow",
-                result={"output": "done"},
-                user_id=uuid.uuid4(),
-            )
-            assert result is None
-
-    @pytest.mark.asyncio
-    async def test_post_workflow_handoff_fallback_to_notification(self):
-        """post_workflow_handoff falls back to system notification."""
-        from app.workflows.workstream import post_workflow_handoff
-
-        with patch("app.core.notifications.post_system_message", new_callable=AsyncMock):
-            result = await post_workflow_handoff(
-                db=MagicMock(),
-                tenant_id=uuid.uuid4(),
-                instance_id=uuid.uuid4(),
-                workflow_name="Test Workflow",
-                handoff_type="review_needed",
-                assignee_id=uuid.uuid4(),
-                description="Please review",
-                user_id=uuid.uuid4(),
-            )
-            assert result is None