fix callers of count_tokens

[GdoongMathew]

Summary

Fix callers in simple_chat.py and websocket_wiki.py calling signature. Since the input signatures are as follows

def count_tokens(text: str, embedder_type: str = None, is_ollama_embedder: bool = None) -> int:

passing a bool value to the embedder_type is missleading. Change to pass provider string directly.

[gemini-code-assist]

Code Review

This pull request updates the token counting logic in both api/simple_chat.py and api/websocket_wiki.py to pass the raw request.provider string as the embedder_type argument to count_tokens. The reviewer suggests normalizing the provider string to lowercase using .lower() to ensure robust, case-insensitive matching and prevent potential issues with mixed-case provider names.

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[gemini-code-assist]

Since request.provider is defined as a general str without strict casing validation in ChatCompletionRequest, a user could potentially pass provider names with mixed or upper casing (e.g., "Ollama", "Google"). Since count_tokens performs exact string matching (e.g., embedder_type == 'ollama'), passing the raw provider string directly might bypass the correct tokenizer selection. Normalizing the provider string to lowercase using .lower() ensures robust and case-insensitive matching.

Suggested change

	tokens = count_tokens(last_message.content, embedder_type=request.provider)
	tokens = count_tokens(last_message.content, embedder_type=request.provider.lower())

[gemini-code-assist]

Since request.provider is defined as a general str without strict casing validation in ChatCompletionRequest, a user could potentially pass provider names with mixed or upper casing (e.g., "Ollama", "Google"). Since count_tokens performs exact string matching (e.g., embedder_type == 'ollama'), passing the raw provider string directly might bypass the correct tokenizer selection. Normalizing the provider string to lowercase using .lower() ensures robust and case-insensitive matching.

Suggested change

	tokens = count_tokens(last_message.content, embedder_type=request.provider)
	tokens = count_tokens(last_message.content, embedder_type=request.provider.lower())