Improve input for DL CLI add_missing_files.

[fchirica]

Fix for bug #17039

[coveralls-official]

Pull Request Test Coverage Report for Build 7203698266

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• 0 of 0 changed or added relevant lines in 0 files are covered.
• 140 unchanged lines in 30 files lost coverage.
• Overall coverage decreased (-0.1%) to 90.287%

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Files with Coverage Reduction	New Missed Lines	%
chia/daemon/client.py	1	84.38%
chia/daemon/keychain_proxy.py	1	64.98%
chia/daemon/server.py	1	87.4%
chia/data_layer/download_data.py	1	71.04%
chia/farmer/farmer.py	1	66.56%
chia/rpc/wallet_rpc_api.py	1	88.1%
chia/timelord/timelord_launcher.py	1	69.77%
tests/fee_estimation/test_fee_estimation_unit_tests.py	1	99.06%
tests/simulation/test_simulation.py	1	96.52%
tests/util/setup_nodes.py	1	98.35%

Totals
Change from base Build 7209285624:	-0.1%
Covered Lines:	93811
Relevant Lines:	103852

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💛 - Coveralls