Mimetype - LMDB files have no mimetype

SUMMARY:

LMDB (Lightning Memory-Mapped Database) files are not included in the mimetype
database. They have a magic number, 0xBEEFC0DE, documented in source code.

STEPS TO REPRODUCE:

Check the mime type of baloo's index:

    xdg-mime query filetype ~/.local/share/baloo/index

or

    kmimetypefinder5 ~/.local/share/baloo/index 

OBSERVED RESULTS

There's no mimetype returned. Querying with "file" give a simple "data" and a
hexdump gives:

    0000000 0000 0000 0000 0000 0000 0008 0000 0000
    0000020 c0de beef 0001 0000 0000 0000 0000 0000

EXPECTED RESULTS

Maybe...  "application/x-lmdb"

SOFTWARE/OS VERSIONS

Neon Testing

Plasma : 5.22.5
Frameworks : 5.86.0
Qt : 5.15.3 

$ dpkg-query --show shared-mime-info
shared-mime-info        1.15-1

ADDITIONAL INFORMATION

See:

    https://git.openldap.org/openldap/openldap/-/blob/mdb.master/libraries/liblmdb/mdb.c

and search for MDB_MAGIC

    #define MDB_MAGIC     0xBEEFC0DE