Display declared datatypes and affinity for SQLite columns.

[igalklebanov]

Hey 👋

Currently, only the affinity of columns is displayed. We should look into displaying both affinity AND declared datatypes. Its odd seeing "numeric" when the user defined the column as "datetime" originally.

[sorenbs]

Hey @igalklebanov 👋 Still agreed — showing numeric for a column the user declared as datetime is confusing. Related progress: #1550 fixes the worse half of that confusion (those date-like NUMERIC-affinity columns no longer coerce input to numbers/NaN — they edit as text now), and SQLite's declared types are already captured during introspection, so this becomes a display-layer change: show the declared type with the affinity as secondary info. Keeping open as a well-scoped follow-up.