refactor: ♻️ Removing outdated Optional[] to new version convetions

Author: marcvergees

api/schemas/forms.py

@@ -1,13 +1,11 @@
-from typing import Optional
-
 from pydantic import BaseModel, field_validator
 
 class FormFill(BaseModel):
     template_id: int
     input_text: str
     # Optional Ollama model override for this fill; falls back to OLLAMA_MODEL.
     # Not persisted (no DB column) — excluded before building FormSubmission.
-    model: Optional[str] = None
+    model: str | None = None
 
     @field_validator("input_text")
     def validate_input_text(cls, value):