merge this (#4759)

* wait I forgot to comit locally

* cp the entire core directory and then rm the .git subdir

letta/schemas/providers/__init__.py

@@ -0,0 +1,45 @@
+# Provider base classes and utilities
+# Provider implementations
+from .anthropic import AnthropicProvider
+from .azure import AzureProvider
+from .base import Provider, ProviderBase, ProviderCheck, ProviderCreate, ProviderUpdate
+from .bedrock import BedrockProvider
+from .cerebras import CerebrasProvider
+from .deepseek import DeepSeekProvider
+from .google_gemini import GoogleAIProvider
+from .google_vertex import GoogleVertexProvider
+from .groq import GroqProvider
+from .letta import LettaProvider
+from .lmstudio import LMStudioOpenAIProvider
+from .mistral import MistralProvider
+from .ollama import OllamaProvider
+from .openai import OpenAIProvider
+from .together import TogetherProvider
+from .vllm import VLLMProvider
+from .xai import XAIProvider
+
+__all__ = [
+    # Base classes
+    "Provider",
+    "ProviderBase",
+    "ProviderCreate",
+    "ProviderUpdate",
+    "ProviderCheck",
+    # Provider implementations
+    "AnthropicProvider",
+    "AzureProvider",
+    "BedrockProvider",
+    "CerebrasProvider",  # NEW
+    "DeepSeekProvider",
+    "GoogleAIProvider",
+    "GoogleVertexProvider",
+    "GroqProvider",
+    "LettaProvider",
+    "LMStudioOpenAIProvider",
+    "MistralProvider",
+    "OllamaProvider",
+    "OpenAIProvider",
+    "TogetherProvider",
+    "VLLMProvider",  # Replaces ChatCompletions and Completions
+    "XAIProvider",
+]