feat(memory, model): update multi-modal memory write and model list API

- Adjust multi-modal memory write behavior for text and visual data
- Mask API keys in model list response to prevent exposure
- Add capability-based filtering to the model list API

api/app/models/models_model.py

@@ -2,10 +2,11 @@ import datetime
 import uuid
 from enum import StrEnum
 
-from sqlalchemy import Column, String, Boolean, DateTime, Text, ForeignKey, Enum as SQLEnum, UniqueConstraint, Integer, ARRAY, Table, text
-from sqlalchemy.dialects.postgresql import UUID, JSON
+from sqlalchemy import Column, String, Boolean, DateTime, Text, ForeignKey, UniqueConstraint, Integer, Table, text
+from sqlalchemy.dialects.postgresql import UUID, JSON, ARRAY
 from sqlalchemy.orm import relationship
 from sqlalchemy.sql import func
+
 from app.db import Base