fix: format tests/test_agents.py to pass black CI check

[Copilot]

CI was failing because tests/test_agents.py didn't comply with black formatting — single quotes throughout, non-standard @pytest.mark.parametrize layout.

Changes

• tests/test_agents.py: Auto-formatted with black — converts single → double quotes, normalizes parametrize to multi-line style, adds trailing commas

[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

This PR reformats tests/test_agents.py with Black, correcting quoting, parameterization layout, line wrapping, and related style issues without changing test behavior.

File-Level Changes

Change	Details	Files
Apply Black formatting to the agent tests so the CI formatting check passes.	Normalize string quoting and general style. Reformat pytest parameterization and related constructs. Apply Black’s line-wrapping and trailing-comma rules, including the inbound reply call.	tests/test_agents.py

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