refactor(agent): remove memory agent, simplify runtime config system

backend/src/schemas/memories/__init__.py

@@ -1,11 +1,70 @@
 from __future__ import annotations
 
-from typing import ClassVar
+from datetime import datetime
+from enum import Enum
+from typing import Any, ClassVar, Literal
+from uuid import UUID
 
-from pydantic import BaseModel, ConfigDict
+from pydantic import BaseModel, ConfigDict, Field
 
 
-class MemoryContent(BaseModel):
-    model_config: ClassVar[ConfigDict] = ConfigDict(extra="allow")
+class MemoryType(str, Enum):
+    USER = "user"
+    WORK = "work"
 
-    pass
+
+class MemorySource(str, Enum):
+    MANUAL = "manual"
+    AGENT = "agent"
+    IMPORTED = "imported"
+
+
+class MemoryStatus(str, Enum):
+    ACTIVE = "active"
+    DISABLED = "disabled"
+
+
+class MemoryModel(BaseModel):
+    model_config: ClassVar[ConfigDict] = ConfigDict(
+        extra="forbid", from_attributes=True
+    )
+
+    id: UUID
+    owner_id: UUID
+    agent_id: UUID | None = None
+    memory_type: Literal["user", "work"]
+    title: str | None = None
+    content: dict[str, Any]
+    source: MemorySource
+    status: MemoryStatus
+    created_at: datetime
+    updated_at: datetime
+
+
+class MemoryContext(BaseModel):
+    model_config: ClassVar[ConfigDict] = ConfigDict(extra="forbid")
+
+    memory_type: MemoryType
+    source: MemorySource
+    title: str | None = None
+    content: dict[str, Any]
+    created_at: datetime
+    updated_at: datetime
+
+
+class MemoryListResponse(BaseModel):
+    model_config: ClassVar[ConfigDict] = ConfigDict(extra="forbid")
+
+    owner_id: UUID
+    memories: list[MemoryContext] = Field(default_factory=list)
+    total: int
+
+
+__all__ = [
+    "MemoryContext",
+    "MemoryListResponse",
+    "MemoryModel",
+    "MemorySource",
+    "MemoryStatus",
+    "MemoryType",
+]