Add type hints to the characterize_file script #1783

Job	Run time
Test frontend	24s
Lint	1m 12s
Test mcp-server on 3.8	5m 44s
Test mcp-server on 3.9	5m 48s
Test mcp-server on 3.10	5m 55s
Test mcp-server on 3.11	5m 59s
Test mcp-server on 3.12	6m 43s
Test mcp-client on 3.8	5m 55s
Test mcp-client on 3.9	5m 57s
Test mcp-client on 3.10	6m 40s
Test mcp-client on 3.11	6m 25s
Test mcp-client on 3.12	8m 0s
Test dashboard on 3.8	6m 52s
Test dashboard on 3.9	7m 29s
Test dashboard on 3.10	7m 36s
Test dashboard on 3.11	7m 51s
Test dashboard on 3.12	7m 56s
Test archivematica-common on 3.8	5m 49s
Test archivematica-common on 3.9	6m 0s
Test archivematica-common on 3.10	5m 43s
Test archivematica-common on 3.11	5m 58s
Test archivematica-common on 3.12	6m 35s
Test storage-service on 3.9	5m 49s
Test migrations on 3.9	5m 59s
	2h 24m 19s

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