fix: relax adapter_type validation pattern to accept all frontend adapter types

backend/schemas/agent.py

@@ -12,7 +12,7 @@ class AgentBase(BaseModel):
     company_id: str
     name: str = Field(..., min_length=1, max_length=255)
     role: str = Field(..., min_length=1, max_length=255)
-    adapter_type: str = Field(..., pattern="^(claude|codex|openclaw|custom)$")
+    adapter_type: str = Field(..., pattern=r"^[a-z][a-z0-9_]*$")
     adapter_config: Dict[str, Any] = Field(default_factory=dict)
     runtime_config: Dict[str, Any] = Field(default_factory=dict)
     budget_monthly_cents: int = Field(0, ge=0)
@@ -34,7 +34,7 @@ class AgentUpdate(BaseModel):
 
     name: Optional[str] = Field(None, min_length=1, max_length=255)
     role: Optional[str] = Field(None, min_length=1, max_length=255)
-    adapter_type: Optional[str] = Field(None, pattern="^(claude|codex|openclaw|custom)$")
+    adapter_type: Optional[str] = Field(None, pattern=r"^[a-z][a-z0-9_]*$")
     adapter_config: Optional[Dict[str, Any]] = None
     runtime_config: Optional[Dict[str, Any]] = None
     budget_monthly_cents: Optional[int] = Field(None, ge=0)