feat: adding filter on message when non validator

[Freyskeyd]

Description

In order to prevent many non validator's messages to be published on the gossip topics, I introduced an update where the message is filtered when the DoubleEcho is producing events.

For validator nothing changed, for FullNode and Sentry node, their Echo and Ready messages are filtered, they still produce Gossip messages tho.

It doesn't mean that a FullNode will not propagate messages from validators, it only prevents a non validator to publish messages that will be ignored by others. FullNode still consume Echo and Ready coming from validators and build their state same as before.

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works

[codecov]

Codecov Report

Attention: 9 lines in your changes are missing coverage. Please review.

Comparison is base (b424aa9) 62.85% compared to head (ebde07e) 62.85%.

Files	Patch %	Lines
crates/topos-tce/src/lib.rs	0.00%	5 Missing ⚠️
crates/topos-tce/src/app_context/protocol.rs	50.00%	4 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #405   +/-   ##
=======================================
  Coverage   62.85%   62.85%           
=======================================
  Files         220      221    +1     
  Lines       11801    11818   +17     
=======================================
+ Hits         7417     7428   +11     
- Misses       4384     4390    +6     

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[dvdplm]

LGTM

I would copy the (excellent) PR description into the module docs for DoubleEcho.