refactor: Improve rendezvous protocol usage

[bgins]

Description

This pull request implements the following features:

• Add event handler cache implementation
• Renew rendezvous registration at expiration
• Re-discover from rendezvous servers on a set interval
• Renew discovered peer registrations when they expire
• Remove behavior where we add other peers to external_addresses
• Add check to not dial ourselves on rendezvous discovery
• Update dialing on rendezvous discovery to only dial peers we aren't already connected to
• Add rendezvous server Dialing, PeerRegistered, and RegistrationExpired event debug logs
• Separate enable_rendezvous config into enable_rendezvous_server and enable_rendezvous_client configs (server is opt-in, client is opt-out)
• Add max_connected_peers config
• Add rendezvous_registration_ttl and rendezvous_discovery_interval configs
• Test rendezvous register, discover, and connect
• Test disconnect after rendezvous connect
• Test registration expires and re-registration on expiration
• Test discovered registration expires and rediscovery attempted at expiration
• Test rediscovery on rendezvous discovery interval
• Add extract_timestamps_where and count_lines_where test utilities
• Update libp2p deprecated Kademlia and SwarmBuilder interfaces
• Update integration test fixtures to avoid overlapping ports

Link to issue

Implements #131.

Type of change

• New feature (non-breaking change that adds functionality)
• Refactor (non-breaking change that updates existing functionality)
• Comments have been added/updated

Test plan (required)

We are adding tests to check existing functionality and a test to check registration renewals.

[codecov]

Codecov Report

Merging #399 (0ea35d0) into main (fc542ef) will decrease coverage by 1.10%.
Report is 13 commits behind head on main.
The diff coverage is 21.67%.

@@            Coverage Diff             @@
##             main     #399      +/-   ##
==========================================
- Coverage   71.91%   70.82%   -1.10%     
==========================================
  Files          71       72       +1     
  Lines        6955     7190     +235     
==========================================
+ Hits         5002     5092      +90     
- Misses       1953     2098     +145     

Files	Coverage Δ
homestar-core/src/workflow/instruction_result.rs	90.24% <100.00%> (+0.12%)	⬆️
homestar-runtime/src/event_handler.rs	95.38% <100.00%> (+1.63%)	⬆️
homestar-runtime/src/logger.rs	92.00% <100.00%> (+0.10%)	⬆️
homestar-runtime/src/settings.rs	98.28% <100.00%> (+0.05%)	⬆️
homestar-core/src/unit.rs	37.50% <0.00%> (ø)
homestar-runtime/src/network/swarm.rs	61.20% <29.03%> (+1.08%)	⬆️
homestar-runtime/src/event_handler/cache.rs	22.50% <22.50%> (ø)
homestar-runtime/src/event_handler/event.rs	12.25% <0.00%> (-1.56%)	⬇️
homestar-runtime/src/event_handler/swarm_event.rs	19.05% <9.33%> (+3.48%)	⬆️

... and 8 files with indirect coverage changes

[zeeshanlakhani]

First pass. Need to look at the tests a little more, but this is looking great.

[zeeshanlakhani]

@bgins thinking maybe we do have some substruct here: rendezvous, which has ttl and discovery interval and cookies? Trying to clean up this bit on length here. We may want the same for the two connected peers.

[bgins]

Done! Also added discovered_peers to the rendezvous one because it is not relevant for peers discovered through mDNS. We may revisit if we use the proposed ambient discovery protocol in the future.

Was slightly unsure about the naming for the connected peers one. Went with this struct:

homestar/homestar-runtime/src/event_handler.rs

Lines 104 to 108 in 1d4079b

	// Connected peers configuration and state
	struct Connections {
	peers: FnvHashMap<PeerId, ConnectedPoint>,
	max_peers: u32,
	}

Which on the event handler is:

homestar/homestar-runtime/src/event_handler.rs

Line 64 in 1d4079b

connections: Connections,

And when used we have event_handler.connections.peers and event_handler.connections.max_peers. In the first one, having connections and peers seems a bit redundant? I might be overthinking it.