feat: improve backpressure gossipsub batch

[Freyskeyd]

Description

This PR aims to allow us to have numbers for the benchmarks.

Here's a non-exhaustive list of what it covers:

• Upgrade various deps
• Adding metrics system and Prometheus/Grafana config
• Switch to InMemory model for PendingCertificates
• Refactor some part of the project to make it more performant and reliable

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

Merging #248 (7308f90) into main (49b17e9) will decrease coverage by 1.86%.
The diff coverage is 63.84%.

❗ Current head 7308f90 differs from pull request most recent head 20da5bb. Consider uploading reports for the commit 20da5bb to get more accurate results

@@            Coverage Diff             @@
##             main     #248      +/-   ##
==========================================
- Coverage   54.99%   53.14%   -1.86%     
==========================================
  Files         192      198       +6     
  Lines        9626     9990     +364     
==========================================
+ Hits         5294     5309      +15     
- Misses       4332     4681     +349     

Impacted Files	Coverage Δ
crates/topos-certificate-spammer/src/lib.rs	0.35% <ø> (ø)
crates/topos-metrics/src/storage.rs	0.00% <0.00%> (ø)
crates/topos-p2p/src/behaviour.rs	100.00% <ø> (ø)
crates/topos-p2p/src/behaviour/discovery.rs	71.05% <ø> (-0.38%)	⬇️
crates/topos-p2p/src/behaviour/peer_info.rs	100.00% <ø> (ø)
...ates/topos-p2p/src/behaviour/transmission/codec.rs	1.81% <ø> (ø)
...s/topos-p2p/src/behaviour/transmission/protocol.rs	0.00% <ø> (-100.00%)	⬇️
crates/topos-p2p/src/event.rs	46.66% <0.00%> (-6.28%)	⬇️
crates/topos-p2p/src/lib.rs	85.00% <ø> (ø)
crates/topos-p2p/src/tests/dht.rs	40.00% <ø> (ø)
... and 40 more

... and 9 files with indirect coverage changes