feat: Send state event to timeline when crypto identity changed

[krille-chan]

closes https://github.com/famedly/product-management/issues/3789

[codecov]

Codecov Report

❌ Patch coverage is 33.76623% with 51 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.14%. Comparing base (9aeaef9) to head (34df795).

Files with missing lines	Patch %	Lines
lib/src/utils/on_tofu_event.dart	0.00%	16 Missing ⚠️
lib/encryption/key_manager.dart	44.00%	14 Missing ⚠️
lib/src/utils/event_localizations.dart	0.00%	10 Missing ⚠️
lib/src/utils/device_keys_list.dart	58.82%	7 Missing ⚠️
lib/src/database/matrix_sdk_database.dart	0.00%	2 Missing ⚠️
lib/src/utils/matrix_default_localizations.dart	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2252      +/-   ##
==========================================
- Coverage   58.24%   58.14%   -0.11%     
==========================================
  Files         160      161       +1     
  Lines       19851    19924      +73     
==========================================
+ Hits        11563    11585      +22     
- Misses       8288     8339      +51     

Files with missing lines	Coverage Δ
lib/matrix_api_lite/model/event_types.dart	100.00% <ø> (ø)
lib/src/client.dart	77.85% <100.00%> (+0.04%)	⬆️
lib/src/database/database_api.dart	0.00% <ø> (ø)
lib/src/utils/matrix_localizations.dart	100.00% <ø> (ø)
lib/src/database/matrix_sdk_database.dart	91.36% <0.00%> (-0.19%)	⬇️
lib/src/utils/matrix_default_localizations.dart	55.94% <0.00%> (-0.80%)	⬇️
lib/src/utils/device_keys_list.dart	91.32% <58.82%> (-2.28%)	⬇️
lib/src/utils/event_localizations.dart	57.89% <0.00%> (-3.22%)	⬇️
lib/encryption/key_manager.dart	85.00% <44.00%> (-1.97%)	⬇️
lib/src/utils/on_tofu_event.dart	0.00% <0.00%> (ø)

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[td-famedly]

can you link a issue please?