Add configurable LLM provider adapters for email classification

app/models.py

@@ -1,5 +1,28 @@
-from pydantic import BaseModel
+from __future__ import annotations
+
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
 
 class EmailData(BaseModel):
     subject: str
     body: str
+
+
+class ClassifyRequest(BaseModel):
+    email_data: EmailData
+    provider: Literal["openai", "anthropic"] | None = None
+    model: str | None = None
+    base_url: str | None = None
+    api_key: str | None = Field(default=None, exclude=True)
+    temperature: float | None = None
+
+
+class ClassificationResult(BaseModel):
+    needs_action: bool
+    category: Literal["action_required", "question", "fyi", "newsletter", "promotional", "automated", "alert", "uncategorized"]
+    priority: Literal["high", "medium", "low"]
+    task_description: str | None = None
+    reasoning: str
+    confidence: float