Refactor backend to support interface-definition driven model resources

- Introduce a new model structure for managing interface definitions and model resources, enhancing the backend's capability to handle various service integrations.
- Update the Makefile to reflect changes in database seeding and resource management commands.
- Remove the deprecated credentials management routes and replace them with a unified model registry API.
- Modify existing routes and schemas to align with the new model structure, ensuring seamless integration with the frontend.
- Enhance database seeding scripts to populate new model resources and their configurations.
- Update README documentation to reflect the new architecture and usage instructions for model resources and interface definitions.

backend/schemas.py

@@ -1,6 +1,6 @@
 """面向前端的请求/响应 DTO。与 DB 模型解耦,**响应里的 key 一律打码**。
 
-凭证 DTO 字段对齐前端 ComponentsModelsPage 的 ModelResource:
+模型资源 DTO 字段对齐前端 ComponentsModelsPage 的 ModelResource:
 JSON 用 camelCase(modelId/interfaceType/apiUrl/apiKey),Python 内部用 snake_case,
 靠 Pydantic alias 自动互转。FastAPI 响应默认 by_alias=True,所以出参也是 camelCase。
 """
@@ -9,12 +9,11 @@ from __future__ import annotations
 
 from typing import Any, Literal
 
-from pydantic import BaseModel, ConfigDict, model_validator
+from pydantic import BaseModel, ConfigDict, Field, model_validator
 from pydantic.alias_generators import to_camel
 
 RuntimeMode = Literal["pipeline", "realtime"]
 ModelType = Literal["LLM", "ASR", "TTS", "Realtime", "Embedding"]
-InterfaceType = Literal["openai", "xfyun", "dashscope", "gemini"]
 AssistantType = Literal["prompt", "workflow", "dify", "fastgpt", "opencode"]
 
 # 外部应用类型:其 config.apiKey 是该助手私有密钥,读时打码 / 写时哨兵
@@ -49,11 +48,7 @@ class AssistantUpsert(CamelModel):
     greeting: str = ""
     enable_interrupt: bool = True
 
-    # 引用注册资源(FK id;None=未选)
-    llm_credential_id: str | None = None
-    asr_credential_id: str | None = None
-    tts_credential_id: str | None = None
-    realtime_credential_id: str | None = None
+    model_resource_ids: dict[ModelType, str] = Field(default_factory=dict)
     knowledge_base_id: str | None = None
 
     # 瘦类型专属(真列);按 type 取用,无关字段写入时清零
@@ -62,7 +57,7 @@ class AssistantUpsert(CamelModel):
     api_key: str = ""  # 写时:占位符/空 → 保留旧(哨兵)
     app_id: str = ""
     # workflow 专属:图
-    graph: dict[str, Any] = {}
+    graph: dict[str, Any] = Field(default_factory=dict)
 
     @model_validator(mode="after")
     def _strip_irrelevant_fields(self):
@@ -84,7 +79,7 @@ class AssistantOut(AssistantUpsert):
 class KnowledgeBaseUpsert(CamelModel):
     name: str
     description: str = ""
-    embedding_credential_id: str | None = None
+    embedding_model_resource_id: str | None = None
 
 
 class KnowledgeBaseOut(KnowledgeBaseUpsert):
@@ -93,55 +88,32 @@ class KnowledgeBaseOut(KnowledgeBaseUpsert):
     updated_at: str | None = None
 
 
-# ---------- 模型凭证(对齐前端 ModelResource) ----------
-class CredentialUpsert(CamelModel):
-    name: str = ""                              # 资源名称
-    model_id: str = ""                          # 模型ID
-    type: ModelType                             # LLM/ASR/TTS/Realtime/Embedding
-    interface_type: InterfaceType = "openai"    # openai/xfyun/dashscope/gemini
-    api_url: str = ""
-    api_key: str = ""                           # 写时:占位符/空表示不改
-    voice: str = ""                             # TTS
-    speed: float = 1.0                          # TTS
-    language: str = ""                          # ASR
+# ---------- 接口定义驱动的统一模型资源 ----------
+class InterfaceDefinitionOut(CamelModel):
+    interface_type: str
+    name: str
+    capability: ModelType
+    field_schema: dict[str, Any]
+    enabled: bool
+    version: int
+
+
+class ModelResourceUpsert(CamelModel):
+    name: str
+    interface_type: str
+    values: dict[str, Any] = Field(default_factory=dict)
+    secrets: dict[str, Any] = Field(default_factory=dict)
+    enabled: bool = True
     is_default: bool = False
 
-    @model_validator(mode="after")
-    def _strip_irrelevant_options(self):
-        if self.type != "TTS":
-            self.voice = ""
-            self.speed = 1.0
-        if self.type != "ASR":
-            self.language = ""
-        return self
 
-
-class CredentialOut(CamelModel):
+class ModelResourceOut(ModelResourceUpsert):
     id: str
-    name: str
-    model_id: str
-    type: str
-    interface_type: str
-    api_url: str
-    api_key: str                                # 读时:打码后的值
-    voice: str
-    speed: float
-    language: str
-    is_default: bool
+    capability: ModelType
+    updated_at: str | None = None
 
 
-class CredentialTestRequest(CamelModel):
-    model_id: str
-    type: ModelType
-    interface_type: InterfaceType = "openai"
-    api_url: str
-    api_key: str = ""
-    voice: str = ""
-    speed: float = 1.0
-    language: str = ""
-
-
-class CredentialTestResult(CamelModel):
+class ModelResourceTestResult(CamelModel):
     ok: bool
     latency_ms: int | None = None
     message: str