CPlot: validCassiopee: test duration and tag added to test metadata

[vincentcasseau]

Test duration and tag added to the test metadata JSON dict in the ValidData folder. Use time and star file to first build the metadata file, then interrogate the JSON dict only which seems to be faster. Tags are local: markers will persist when switching to and from the local/global database. The reference history is kept down to a maximum of 5 entries.

• May need further testing from other users before merging to main.
• Please do not push commits causing regressions while this commit is pending (metadata files already created and up-to-date on ld and juno).

Example

    "Apps/IBMrotation_t1.py": {
        "coverage": "0%",
        "ref": [
            {
                "date": "27/08/24 11h15",
                "hashCassiopee": "Unknown",
                "hashFast": "Unknown"
            }
        ],
        "tag": " ",
        "time": "0m2.49s"
    },
    "Apps/Mirabelle_t1.py": {
        "coverage": "0%",
        "ref": [
            {
                "date": "13/12/24 13h21",
                "hashCassiopee": "ff3425c",
                "hashFast": "3934c08"
            }
        ],
        "tag": " ",
        "time": "0m0.6s"
    },