fix(tracing): set Traces source to CodedAgents #162

Job	Run time
build-wheels	-1s
${{ matrix.package }} / py${{ matrix.python-version }} / ${{ matrix.os }}	0s
discover-testcases	0s
${{ matrix.package }} / ${{ matrix.testcase }} / ${{ matrix.environment }}	0s
notify-on-failure	0s
discover-packages	-7s
	-8s

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