Chain fault testing framework + Enable auto-rejoin

[GTC6244]

Pull request overview

This PR introduces a chain fault testing framework to test node behavior when blockchain connectivity is disrupted. The framework leverages Toxiproxy to simulate network faults between nodes and blockchain endpoints, enabling automated testing of node resilience and validator kick mechanisms.

Key changes:

• Adds new chain fault test infrastructure with proxy-based blockchain connection simulation
• Implements helper functions to disable/enable chain connections for individual nodes
• Extends testnet configuration to support signing round timeout customization
• Adds utility function in Actions to bulk update complaint configurations for testing

[Copilot]

Pull request overview

This PR introduces a chain fault testing framework to test node behavior when blockchain connectivity is disrupted. The framework leverages Toxiproxy to simulate network faults between nodes and blockchain endpoints, enabling automated testing of node resilience and validator kick mechanisms.

Key changes:

• Adds new chain fault test infrastructure with proxy-based blockchain connection simulation
• Implements helper functions to disable/enable chain connections for individual nodes
• Extends testnet configuration to support signing round timeout customization
• Adds utility function in Actions to bulk update complaint configurations for testing

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
rust/lit-node/lit-node/tests/toxiproxy/chain_faults.rs	New test file implementing chain connection fault testing, specifically testing node kick behavior when a node loses blockchain connectivity
rust/lit-node/lit-node/tests/toxiproxy/mod.rs	Exports the new chain_faults module
rust/lit-node/lit-node/tests/common/faults.rs	Adds helper functions for chain-specific proxy setup and fault injection (enable/disable chain connections)
rust/lit-node/lit-node-testnet/src/testnet/node_config.rs	Extends node configuration builder to support custom signing round timeout settings
rust/lit-node/lit-node-testnet/src/testnet/actions.rs	Adds bulk complaint configuration update utility for testing
rust/lit-node/lit-node-testnet/src/lib.rs	Integrates signing round timeout configuration into TestSetupBuilder
rust/lit-core/lit-blockchain/src/contracts/mod.rs	Implements proxy port remapping for blockchain providers when proxy_chatter feature is enabled
rust/lit-node/lit-node/Cargo.toml	Updates feature flags to include blockchain testing support
rust/lit-node/lit-node-testnet/Cargo.toml	Removes duplicate proxy-chatter feature definition
rust/lit-core/lit-blockchain/Cargo.toml	Adds testing and proxy_chatter feature flags
rust/lit-node/shiva/log_levels.toml	Increases lit_blockchain log level to trace for debugging
rust/lit-node/lit-node/src/git_info.rs	Updates git commit hash (auto-generated)

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[github-actions]

PASS [ 43.110s] (3/3) lit_node::test toxiproxy::perf_tests::load_with_no_latency
PASS [ 43.334s] (2/3) lit_node::test toxiproxy::perf_tests::load_with_50ms_latency_single_link
PASS [ 88.791s] (1/3) lit_node::test toxiproxy::perf_tests::load_with_50ms_latency_all_links