Opening entries with one-time passwords crash the application

Description:

Without having installed the python-cairo package, secrets will crash when trying to open (clicking on) an entry with a one-time password.

Additional info:

• package version(s): secrets 9.6-1
• config and/or log files: output of running secrets -d:

  04-09-24 15:10:50 | DEBUG | Opening last opened database: /home/hoedt/vault.kdbx
  04-09-24 15:10:56 | DEBUG | Generate key for FileProvider
  04-09-24 15:10:56 | DEBUG | Generate key for Pkcs11Provider
  04-09-24 15:10:56 | DEBUG | Generate key for YubiKeyProvider
  04-09-24 15:10:56 | DEBUG | No key providers in use, returning None
  04-09-24 15:10:57 | DEBUG | Opening of safe /home/hoedt/vault.kdbx was successful
  04-09-24 15:10:57 | DEBUG | Starting automatic save loop
  Traceback (most recent call last):
    File "/usr/lib/python3.12/site-packages/gsecrets/widgets/progress_icon.py", line 19, in do_snapshot_symbolic
      ctx = snapshot.append_cairo(rect)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  TypeError: Couldn't find foreign struct converter for 'cairo.Context'

• link to upstream bug report, if any: N.A.

Steps to reproduce:

1. Set up a minimal Gnome install without having python-cairo installed.
2. Open secrets with a Keepass vault containing entries with one-time passwords.
3. Click on an entry with a one-time password
4. App crashes

Proposed fix:

Include python-cairo as a(n optional) dependency.

added priority3-normal severity4-low statusunconfirmed labels

assigned to @freswa, @toolybird, and @gromit

added scopebug statusconfirmed labels and removed statusunconfirmed label

assigned to @heftig and @fabiscafe and unassigned @freswa, @toolybird, and @gromit

closed with commit cf6fd550