Support archive, dated device diagnostics, and prepared national geozone sources

Added archiving and restoration for completed support requests; archived requests are excluded from Dashboard counters.
Added a UTC date plus anonymous screen and viewport dimensions to GPS diagnostics.
Corrected large-phone classification and labels incomplete older diagnostic rows as mobile legacy data.
Repaired the current-month boundary in monthly Risk Assessment statistics.
Split position completeness and incident reports into two clearly explained administration metrics.
Reworked Geozone Administration into collapsed source rows with clear status colours.
Added prepared official-source entries for Belgium, the Netherlands, Luxembourg, Germany, France, the USA, and Canada.
Clarified that planned sources with zero zones are not active checks and that reuse terms must be verified before import.