ollama: Correct tool use for ollama 0.12.10

[js-0s]

Release Notes:

• Fixed ollama 0.12.10 tool use

Issue:

failure to execute tools (parse error)

2025-11-09T00:10:05+01:00 INFO  [ollama] Received line from Ollama: {"model":"qwen3:8b","created_at":"2025-11-08T23:10:05.993258464Z","message":{"role":"assist
ant","content":"","tool_calls":[{"id":"call_f5kqwpjg","function":{"index":0,"name":"find_path","arguments":{"glob":"*led*","offset":0}}}]},"done":false}       
2025-11-09T00:10:05+01:00 ERROR [ollama] Unable to parse chat response: Error("invalid value: map, expected map with a single key", line: 1, column: 229)      
2025-11-09T00:10:05+01:00 ERROR [agent::thread] Turn execution failed: invalid value: map, expected map with a single key at line 1 column 229                 
2025-11-09T00:10:05+01:00 ERROR [agent] Error in model response stream: invalid value: map, expected map with a single key at line 1 column 229

solution: change the structure to be able to parse the tool response:
add id to OllamaToolCall (and change from enum to struct)
add index to OllamaFunctionCall

environment:
dockerized ollama: ollama/ollama
ollama/ollama latest d353379de60a 2 days ago 3.65GB

ollama --version
ollama version is 0.12.10

Zed 0.211.6
394f56d

any tool supporting model

i dont expect you to merge this PR, this rust code might be too hacky, but it would be really great to get some logging for ollama in the future in case some model answers do not match expectations anymore. did not find any useful way to enable debugging output for the real agent conversation

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[js-0s]

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[tidely]

Similar PR: #42275

[bennetbo]

Thank you for working on this, closing in favour of #42275