fix: resolve test failures blocking CI pipeline (OPC mock, route ordering, system stats)

- Add agent fetchrow to OPC mock to fix "Task or agent not found" errors
- Reorder conversation tracker routes: /search, /stats, /trigger before /{session_id}
- Fix test_task_creator_tracked_in_metadata to expect token username (testuser)
- Mock shutil/psutil in system stats test for non-Synology environments

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

dashboard/backend/routers/conversation_tracker.py

@@ -87,95 +87,6 @@ async def list_conversations(
     } for r in rows]
 
 
-@router.get("/{session_id}")
-async def get_conversation(session_id: str):
-    """Get conversation details"""
-    async with await _db() as db:
-        # Get conversation metadata
-        cursor = await db.execute("""
-            SELECT project_path, git_branch, slug, started_at, last_updated_at,
-                   message_count, total_input_tokens, total_output_tokens, model
-            FROM conversations
-            WHERE session_id = ?
-        """, (session_id,))
-        conv = await cursor.fetchone()
-
-        if not conv:
-            raise HTTPException(404, "Conversation not found")
-
-        # Get message count
-        cursor = await db.execute("""
-            SELECT COUNT(*) FROM messages WHERE session_id = ?
-        """, (session_id,))
-        msg_count = (await cursor.fetchone())[0]
-
-    return {
-        "session_id": session_id,
-        "project_path": conv[0],
-        "git_branch": conv[1],
-        "slug": conv[2],
-        "started_at": conv[3],
-        "last_updated_at": conv[4],
-        "message_count": msg_count,
-        "total_input_tokens": conv[6],
-        "total_output_tokens": conv[7],
-        "model": conv[8]
-    }
-
-
-@router.get("/{session_id}/messages")
-async def get_messages(
-    session_id: str,
-    limit: int = Query(100, le=500),
-    offset: int = 0
-):
-    """Get messages for a conversation"""
-    async with await _db() as db:
-        cursor = await db.execute("""
-            SELECT message_uuid, role, content_text, timestamp, model,
-                   input_tokens, output_tokens, has_tool_use, has_thinking
-            FROM messages
-            WHERE session_id = ?
-            ORDER BY timestamp
-            LIMIT ? OFFSET ?
-        """, (session_id, limit, offset))
-        rows = await cursor.fetchall()
-
-        messages = []
-        for r in rows:
-            msg = {
-                "uuid": r[0],
-                "role": r[1],
-                "content": r[2],
-                "timestamp": r[3],
-                "model": r[4],
-                "input_tokens": r[5],
-                "output_tokens": r[6],
-                "has_tool_use": bool(r[7]),
-                "has_thinking": bool(r[8]),
-                "tool_calls": []
-            }
-
-            # Get tool calls for this message
-            if msg["has_tool_use"]:
-                cursor2 = await db.execute("""
-                    SELECT tool_name, tool_input, tool_result, is_error
-                    FROM tool_calls
-                    WHERE message_uuid = ?
-                """, (r[0],))
-                tool_rows = await cursor2.fetchall()
-                msg["tool_calls"] = [{
-                    "name": tr[0],
-                    "input": tr[1],
-                    "result": tr[2],
-                    "is_error": bool(tr[3])
-                } for tr in tool_rows]
-
-            messages.append(msg)
-
-    return messages
-
-
 @router.get("/search")
 async def search_conversations(
     q: str = Query(..., min_length=2),
@@ -284,3 +195,92 @@ async def trigger_summary():
         f.write("1")
 
     return {"status": "triggered"}
+
+
+@router.get("/{session_id}")
+async def get_conversation(session_id: str):
+    """Get conversation details"""
+    async with await _db() as db:
+        # Get conversation metadata
+        cursor = await db.execute("""
+            SELECT project_path, git_branch, slug, started_at, last_updated_at,
+                   message_count, total_input_tokens, total_output_tokens, model
+            FROM conversations
+            WHERE session_id = ?
+        """, (session_id,))
+        conv = await cursor.fetchone()
+
+        if not conv:
+            raise HTTPException(404, "Conversation not found")
+
+        # Get message count
+        cursor = await db.execute("""
+            SELECT COUNT(*) FROM messages WHERE session_id = ?
+        """, (session_id,))
+        msg_count = (await cursor.fetchone())[0]
+
+    return {
+        "session_id": session_id,
+        "project_path": conv[0],
+        "git_branch": conv[1],
+        "slug": conv[2],
+        "started_at": conv[3],
+        "last_updated_at": conv[4],
+        "message_count": msg_count,
+        "total_input_tokens": conv[6],
+        "total_output_tokens": conv[7],
+        "model": conv[8]
+    }
+
+
+@router.get("/{session_id}/messages")
+async def get_messages(
+    session_id: str,
+    limit: int = Query(100, le=500),
+    offset: int = 0
+):
+    """Get messages for a conversation"""
+    async with await _db() as db:
+        cursor = await db.execute("""
+            SELECT message_uuid, role, content_text, timestamp, model,
+                   input_tokens, output_tokens, has_tool_use, has_thinking
+            FROM messages
+            WHERE session_id = ?
+            ORDER BY timestamp
+            LIMIT ? OFFSET ?
+        """, (session_id, limit, offset))
+        rows = await cursor.fetchall()
+
+        messages = []
+        for r in rows:
+            msg = {
+                "uuid": r[0],
+                "role": r[1],
+                "content": r[2],
+                "timestamp": r[3],
+                "model": r[4],
+                "input_tokens": r[5],
+                "output_tokens": r[6],
+                "has_tool_use": bool(r[7]),
+                "has_thinking": bool(r[8]),
+                "tool_calls": []
+            }
+
+            # Get tool calls for this message
+            if msg["has_tool_use"]:
+                cursor2 = await db.execute("""
+                    SELECT tool_name, tool_input, tool_result, is_error
+                    FROM tool_calls
+                    WHERE message_uuid = ?
+                """, (r[0],))
+                tool_rows = await cursor2.fetchall()
+                msg["tool_calls"] = [{
+                    "name": tr[0],
+                    "input": tr[1],
+                    "result": tr[2],
+                    "is_error": bool(tr[3])
+                } for tr in tool_rows]
+
+            messages.append(msg)
+
+    return messages