v4: adding events

[TheMarstonConnell]

Adding events for websockets

[codecov]

Codecov Report

Attention: Patch coverage is 87.68657% with 33 lines in your changes are missing coverage. Please review.

Project coverage is 48.50%. Comparing base (5e4a32c) to head (6e76ab4).

Files	Patch %	Lines
x/storage/keeper/msg_server_file_delete.go	0.00%	13 Missing ⚠️
x/storage/keeper/msg_server_report.go	0.00%	12 Missing ⚠️
x/storage/keeper/msg_server_attest.go	66.66%	6 Missing ⚠️
x/storage/keeper/msg_server_post_file.go	88.23%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #429      +/-   ##
==========================================
+ Coverage   46.81%   48.50%   +1.68%     
==========================================
  Files         211      211              
  Lines        6577     6845     +268     
==========================================
+ Hits         3079     3320     +241     
- Misses       3240     3269      +29     
+ Partials      258      256       -2     

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[karnthis]

my testing looks good, clear to proceed