fix(runner): tolerate Pydantic tool_call objects in verbose logging

[Islam Assanov (islamborghini)]

What Changed

verbose=True crashed on any tool-calling response because seven verbose-print sites called tc.get(...) on ChatCompletionMessageToolCall Pydantic objects, which have no .get().

Two shape-tolerant helpers (_tc_name, _tc_id) consolidate the dict-or-Pydantic access already present at core.py:582 and core.py:1167 and replace the buggy sites in _execute_turns_{async,sync} and _execute_streaming_{async,sync}. Regression test pins the original bug shape.

No public-API change; no behaviour change with verbose=False.

Test Plan

Live reproducer (against main, fails before this patch):

from dedalus_labs import Dedalus
from dedalus_labs.lib.runner import DedalusRunner

def add(a: int, b: int) -> int:
    """Add two numbers."""
    return a + b

client = Dedalus()  # uses DEDALUS_API_KEY
runner = DedalusRunner(client, verbose=True)
runner.run(model="openai/gpt-5-nano",
           input="What is 3 + 4? You MUST call the add tool.",
           tools=[add])

Before: AttributeError: 'ChatCompletionMessageToolCall' object has no attribute 'get'.
After: prints 🔧 Tool calls in response: ['add'] and returns "3 + 4 equals 7.".

Automated:

• uv run pytest tests/lib/test_runner_verbose.py — 4 tests (dict shape, Pydantic shape, defaults, pinned bug shape).
• uv run pytest tests/ --ignore=tests/api_resources — 519 passed, 3 skipped.

Closes #54

[cursor]

PR Summary

Low Risk
Low risk: changes are limited to verbose logging paths and add a small regression test, with no effect when verbose=False. The main risk is minor formatting/diagnostics differences in verbose output.

Overview
Fixes verbose=True crashes when tool calls are returned as Pydantic objects by centralizing tool-call field access in _tc_name/_tc_id and using these helpers across runner verbose print sites.

Adds a regression test (tests/lib/test_runner_verbose.py) covering dict-shaped vs Pydantic-shaped tool calls, default handling, and the original failing .get() behavior.

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