F1: add reusable task backend resources and migrate task tools

backend/task_backend_schemas.py

@@ -0,0 +1,109 @@
+"""Public task backend configuration; runtime credentials stay server-side."""
+
+from typing import Any, Literal
+from urllib.parse import urlsplit
+
+from pydantic import ConfigDict, Field, field_validator, model_validator
+from schemas import CamelModel, ToolBinding
+
+
+class TaskBackendConfig(CamelModel):
+    model_config = ConfigDict(extra="forbid")
+
+    instructions: str = Field(default="", max_length=16000)
+    timeout_seconds: int = Field(default=600, ge=30, le=7200)
+    max_concurrency: Literal[1] = 1
+
+
+class TaskSkill(CamelModel):
+    model_config = ConfigDict(extra="forbid")
+    name: str = Field(min_length=1, max_length=128)
+    content: str = Field(min_length=1, max_length=16000)
+
+    @field_validator("name", "content")
+    @classmethod
+    def require_nonempty(cls, value: str) -> str:
+        if not value.strip():
+            raise ValueError("技能名称和正文不能为空")
+        return value.strip()
+
+
+class ReasonerBackendConfig(TaskBackendConfig):
+    model_resource_id: str = Field(min_length=1, max_length=40)
+    reasoning_effort: Literal["provider_default", "low", "medium", "high"] = "provider_default"
+    tool_bindings: list[ToolBinding] = Field(default_factory=list, max_length=50)
+    skills: list[TaskSkill] = Field(default_factory=list, max_length=20)
+
+    @model_validator(mode="after")
+    def unique_bindings_and_skills(self):
+        ids = [binding.tool_id for binding in self.tool_bindings]
+        if len(ids) != len(set(ids)):
+            raise ValueError("Reasoner 工具绑定不能重复")
+        names = [skill.name for skill in self.skills]
+        if len(names) != len(set(names)):
+            raise ValueError("技能名称不能重复")
+        return self
+
+
+class OpenCodeBackendConfig(TaskBackendConfig):
+    url: str = Field(min_length=1, max_length=2048)
+    directory: str = Field(min_length=1, max_length=2048)
+    username: str = Field(default="opencode", max_length=128)
+    agent: str = Field(default="", max_length=128)
+    model_provider_id: str = Field(default="", max_length=128)
+    model_id: str = Field(default="", max_length=256)
+    skills_note: str = Field(default="", max_length=4000)
+
+    @field_validator("url")
+    @classmethod
+    def validate_url(cls, value: str) -> str:
+        parsed = urlsplit(value)
+        if parsed.scheme not in {"http", "https"} or not parsed.hostname or parsed.username or parsed.password or parsed.query or parsed.fragment:
+            raise ValueError("任务服务须使用不含凭证、查询参数的 HTTP(S) 地址")
+        return value.rstrip("/")
+
+    @field_validator("directory")
+    @classmethod
+    def require_directory(cls, value: str) -> str:
+        if not value.strip():
+            raise ValueError("必须填写远端工作目录")
+        return value.strip()
+
+    @model_validator(mode="after")
+    def require_model_pair(self):
+        if bool(self.model_provider_id) != bool(self.model_id):
+            raise ValueError("远端模型的 provider ID 和 model ID 必须同时填写")
+        return self
+
+
+class TaskBackendUpsert(CamelModel):
+    name: str = Field(min_length=1, max_length=128)
+    type: Literal["reasoner", "opencode"]
+    description: str = Field(default="", max_length=2048)
+    config: ReasonerBackendConfig | OpenCodeBackendConfig
+    secrets: dict[str, Any] = Field(default_factory=dict)
+    enabled: bool = True
+
+    @model_validator(mode="before")
+    @classmethod
+    def select_config(cls, value):
+        if isinstance(value, dict) and value.get("type") in {"reasoner", "opencode"}:
+            value = dict(value)
+            config_class = ReasonerBackendConfig if value["type"] == "reasoner" else OpenCodeBackendConfig
+            raw = value.get("config") or {}
+            if isinstance(raw, CamelModel):
+                raw = raw.model_dump()
+            value["config"] = config_class.model_validate(raw)
+        return value
+
+    @field_validator("name")
+    @classmethod
+    def require_name(cls, value: str) -> str:
+        if not value.strip():
+            raise ValueError("后端名称不能为空")
+        return value.strip()
+
+
+class TaskBackendOut(TaskBackendUpsert):
+    id: str
+    updated_at: str | None = None