Add manual opener tool calls to Assistant model and API

- Introduced `manual_opener_tool_calls` field in the Assistant model to support custom tool calls.
- Updated AssistantBase and AssistantUpdate schemas to include the new field.
- Implemented normalization and migration logic for handling manual opener tool calls in the API.
- Enhanced runtime metadata to include manual opener tool calls in responses.
- Updated tests to validate the new functionality and ensure proper handling of tool calls.
- Refactored tool ID normalization to support legacy tool names for backward compatibility.

api/app/schemas.py

@@ -280,6 +280,7 @@ class AssistantBase(BaseModel):
     name: str
     firstTurnMode: str = "bot_first"
     opener: str = ""
+    manualOpenerToolCalls: List[Dict[str, Any]] = []
     generatedOpenerEnabled: bool = False
     openerAudioEnabled: bool = False
     prompt: str = ""
@@ -310,6 +311,7 @@ class AssistantUpdate(BaseModel):
     name: Optional[str] = None
     firstTurnMode: Optional[str] = None
     opener: Optional[str] = None
+    manualOpenerToolCalls: Optional[List[Dict[str, Any]]] = None
     generatedOpenerEnabled: Optional[bool] = None
     openerAudioEnabled: Optional[bool] = None
     prompt: Optional[str] = None
@@ -350,6 +352,7 @@ class AssistantRuntimeMetadata(BaseModel):
     firstTurnMode: str = "bot_first"
     greeting: str = ""
     generatedOpenerEnabled: bool = False
+    manualOpenerToolCalls: List[Dict[str, Any]] = Field(default_factory=list)
     output: Dict[str, Any] = Field(default_factory=dict)
     bargeIn: Dict[str, Any] = Field(default_factory=dict)
     services: Dict[str, Dict[str, Any]] = Field(default_factory=dict)