Fix TypeError: unhashable type: 'dict' in Ollama stream chat with tools

[woofy0]

Description

When use Ollama's stream_chat with tools, it will throw an exception if it decides to call a tool:

TypeError: unhashable type: 'dict'

Traceback (most recent call last):
  File "C:\projects\llama_index\llama-index-integrations\llms\llama-index-llms-ollama\llama_index\llms\ollama\base.py", line 430, in gen
    "tool_calls": list(set(all_tool_calls)),

The other methods in base.py doesn't seem to call list(set(all_tool_calls)) since it looks like there's already logic above it that guarantees uniqueness in the tool calls.

Version Bump?

Did I bump the version in the pyproject.toml file of the package I am updating? (Except for the llama-index-core package)

• Yes
• No

Type of Change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Your pull-request will likely not be merged unless it is covered by some form of impactful unit testing.

• I added new unit tests to cover this change
• I believe this change is already covered by existing unit tests

Suggested Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added Google Colab support for the newly added notebooks.
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I ran uv run make format; uv run make lint to appease the lint gods

[masci]

LGTM!