fix(messenger): don't dispatch useless member updates

[n0izn0iz]

also wraps multiMemberGroupInitialMemberAnnounced handler in tx

[codecov]

Codecov Report

Merging #3837 (f4e4e5b) into master (c1034dd) will decrease coverage by 0.00%.
The diff coverage is 4.30%.

❗ Current head f4e4e5b differs from pull request most recent head 7ef1178. Consider uploading reports for the commit 7ef1178 to get more accurate results

@@            Coverage Diff             @@
##           master    #3837      +/-   ##
==========================================
- Coverage   29.88%   29.88%   -0.01%     
==========================================
  Files         403      403              
  Lines       34205    34206       +1     
  Branches     1902     1903       +1     
==========================================
  Hits        10222    10222              
- Misses      22665    22666       +1     
  Partials     1318     1318              

Flag	Coverage Δ
js.unittests	12.06% <0.00%> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
go/internal/messengerpayloads/handlers.go	0.00% <0.00%> (ø)
js/packages/redux/reducers/messenger.reducer.ts	26.39% <0.00%> (-0.14%)	⬇️
go/internal/messengerdb/db.go	60.20% <14.28%> (ø)
go/pkg/bertymessenger/testing.go	76.31% <100.00%> (ø)

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[jefft0]

@jefft0 to ask if this is still relevant.

[jefft0]

n0izn0iz says: "This PR could still be relevant. This is an optimization so it doesn't trigger "state changes" and thus logic + rerenders in the front. But it's not very important I believe."

[jefft0]

Keep open because of the comment from n0izn0iz. Not a high priority, and not a bug. Put in draft.