[Bug] db.univar fails with Python error when input table not existing

[neteler]

Describe the bug

db.univar fails with Python error when input table not existing.

To reproduce

GRASS nc_spm_08_grass7/user1: > db.univar bla column=value
WARNING: Table <bla> not found in database
         <$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db> using driver
         <sqlite>
Traceback (most recent call last):
  File "/home/mneteler/software/grass_main/dist.x86_64-pc-linux-gnu/scripts/db.univar", line 384, in <module>
    main()
  File "/home/mneteler/software/grass_main/dist.x86_64-pc-linux-gnu/scripts/db.univar", line 130, in main
    desc_table = gscript.db_describe(table, database=database, driver=driver)
                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/mneteler/software/grass_main/dist.x86_64-pc-linux-gnu/etc/python/grass/script/db.py", line 56, in db_describe
    s = read_command("db.describe", flags="c", table=table, env=env, **args)
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/mneteler/software/grass_main/dist.x86_64-pc-linux-gnu/etc/python/grass/script/core.py", line 554, in read_command
    return handle_errors(returncode, stdout, args, kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/mneteler/software/grass_main/dist.x86_64-pc-linux-gnu/etc/python/grass/script/core.py", line 366, in handle_errors
    raise CalledModuleError(module=module, code=code, returncode=returncode)
grass.exceptions.CalledModuleError: Module run `db.describe -c table=bla` ended with an error.
The subprocess ended with a non-zero return code: 1. See errors above the traceback or in the error output.

Expected behavior

db.univar should print an error message when input table is not existing.

System description

• Operating System: Fedora Linux 39
• GRASS GIS version:

g.version -rge
version=8.4.0dev
date=2024
revision=f4d8c62acd
build_date=2024-05-24
build_platform=x86_64-pc-linux-gnu
build_off_t_size=8
libgis_revision=23c0db50ff
libgis_date=2024-04-16T19:27:24+00:00
proj=9.2.1
gdal=3.7.3
geos=3.12.1
sqlite=3.42.0

Additional context

db.univar is called by v.db.univar and other modules which would benefit from a proper catch-error in db.univar.