style(memory): apply ruff formatting and linting fixes

Auto-fixed linting errors and formatting issues:
- Removed unused imports (F401): pytest, Any, AnalysisType, MemoryType, OutcomeType
- Removed unused variable (F841): hooks variable in test
- Applied consistent formatting across memory service and test files

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/tests/unit/services/memory/mcp/test_service.py

@@ -2,7 +2,6 @@
 """Tests for MemoryToolService."""
 
 from datetime import UTC, datetime
-from typing import Any
 from unittest.mock import AsyncMock, MagicMock, patch
 from uuid import UUID, uuid4
 
@@ -14,11 +13,6 @@ from app.services.memory.mcp.service import (
     ToolResult,
     get_memory_tool_service,
 )
-from app.services.memory.mcp.tools import (
-    AnalysisType,
-    MemoryType,
-    OutcomeType,
-)
 from app.services.memory.types import Outcome
 
 pytestmark = pytest.mark.asyncio(loop_scope="function")
@@ -192,7 +186,9 @@ class TestMemoryToolService:
         context: ToolContext,
     ) -> None:
         """Remember should store in episodic memory."""
-        with patch("app.services.memory.mcp.service.EpisodicMemory") as mock_episodic_cls:
+        with patch(
+            "app.services.memory.mcp.service.EpisodicMemory"
+        ) as mock_episodic_cls:
             # Setup mock
             mock_episode = MagicMock()
             mock_episode.id = uuid4()
@@ -260,7 +256,9 @@ class TestMemoryToolService:
         context: ToolContext,
     ) -> None:
         """Remember should store facts in semantic memory."""
-        with patch("app.services.memory.mcp.service.SemanticMemory") as mock_semantic_cls:
+        with patch(
+            "app.services.memory.mcp.service.SemanticMemory"
+        ) as mock_semantic_cls:
             mock_fact = MagicMock()
             mock_fact.id = uuid4()
 
@@ -311,7 +309,9 @@ class TestMemoryToolService:
         context: ToolContext,
     ) -> None:
         """Remember should store procedures in procedural memory."""
-        with patch("app.services.memory.mcp.service.ProceduralMemory") as mock_procedural_cls:
+        with patch(
+            "app.services.memory.mcp.service.ProceduralMemory"
+        ) as mock_procedural_cls:
             mock_procedure = MagicMock()
             mock_procedure.id = uuid4()
 
@@ -530,15 +530,21 @@ class TestMemoryToolService:
         mock_working_cls.for_session = AsyncMock(return_value=mock_working)
 
         mock_episodic = AsyncMock()
-        mock_episodic.get_recent = AsyncMock(return_value=[MagicMock() for _ in range(10)])
+        mock_episodic.get_recent = AsyncMock(
+            return_value=[MagicMock() for _ in range(10)]
+        )
         mock_episodic_cls.create = AsyncMock(return_value=mock_episodic)
 
         mock_semantic = AsyncMock()
-        mock_semantic.search_facts = AsyncMock(return_value=[MagicMock() for _ in range(5)])
+        mock_semantic.search_facts = AsyncMock(
+            return_value=[MagicMock() for _ in range(5)]
+        )
         mock_semantic_cls.create = AsyncMock(return_value=mock_semantic)
 
         mock_procedural = AsyncMock()
-        mock_procedural.find_matching = AsyncMock(return_value=[MagicMock() for _ in range(3)])
+        mock_procedural.find_matching = AsyncMock(
+            return_value=[MagicMock() for _ in range(3)]
+        )
         mock_procedural_cls.create = AsyncMock(return_value=mock_procedural)
 
         result = await service.execute_tool(
@@ -603,8 +609,12 @@ class TestMemoryToolService:
     ) -> None:
         """Record outcome should store outcome and update procedure."""
         with (
-            patch("app.services.memory.mcp.service.EpisodicMemory") as mock_episodic_cls,
-            patch("app.services.memory.mcp.service.ProceduralMemory") as mock_procedural_cls,
+            patch(
+                "app.services.memory.mcp.service.EpisodicMemory"
+            ) as mock_episodic_cls,
+            patch(
+                "app.services.memory.mcp.service.ProceduralMemory"
+            ) as mock_procedural_cls,
         ):
             mock_episode = MagicMock()
             mock_episode.id = uuid4()