This is an internal object and the property getters are effectively dead
code. Drop this, the property is already write (and construct) only.

According to the spec, this should return the empty string.

And use it for all precondition checks in the available SQLite
functions.

The g_filename_display_basename() function cannot return NULL unless
other precondition checks fail.

We cannot have a SQLITE_TEXT parameter with a NULL string.

Rename some tests for clarity about what functions do they test, and add
more tests around the tracker: namespace set of string functions.

Test some more corners of the builtin functions.

Add some more tests to cover datetime function behavior.

Add some more tests for its behavior.

This flags variable is unused.

Nothing uses the TrackerData::manager property getter, we can
make this property fully write-only.

Nothing uses the TrackerDBStatement property getters. Make all its properties
writable only.

Make it unnecessary for subclasses to override the property, by calling the
get_n_columns() virtual method. This also makes the property getter consistent
with the public method for all cursor implementations.

Ensure that its values match the expectations.

Extend coverage

See merge request https://gitlab.gnome.org/GNOME/tracker/-/merge_requests/661

Add blurbs aroung the tracker_sparql_connection_new(_async) and
TRACKER_SPARQL_ERROR_CORRUPT docs.

We need more modern gi-docgen than what Fedora provides to
handle linking to specific error enum values correctly.

libtracker-sparql: Document handling of corrupted databases

See merge request https://gitlab.gnome.org/GNOME/tracker/-/merge_requests/662

The input stream obtained from a DBus request is leaked after use.

Write SPARQL queries asynchronously, in all of our update(_async)
and batch operations. This means we wait for both the DBus message
and the FD write responses to consider the operation finished,
like we already do for deserialization.

Closes: https://gitlab.gnome.org/GNOME/tracker-miners/-/issues/328

Fix stalls in error handling of DBus updates

Closes tracker-miners#328

See merge request https://gitlab.gnome.org/GNOME/tracker/-/merge_requests/663