Fix TON transaction status from traces

[0xh3rman]

Summary

• Fetch TON traces by inbound message hash when checking transaction status.
• Map incomplete traces to pending and failed trace actions to reverted.
• Keep the existing root transaction fee update from transactionsByMessage.
• Add a real failed STON.fi USDT -> TON swap fixture where the root wallet transaction succeeds but a child trace action fails.

Validation

• cargo fmt --all --check
• cargo test -p gem_ton --features rpc provider::transaction_state_mapper::tests
• cargo clippy -p gem_ton --features rpc --all-targets -- -D warnings

Note

• This PR targets h/ton-stonfi-swap-fixes so the diff only contains the tx-status fix. Retarget to main after the swap PR lands.

[gemini-code-assist]

Code Review

This pull request integrates TON traces into the transaction status logic to improve state accuracy. It adds new trace models, implements an RPC method to fetch traces, and updates the mapping logic to derive transaction states from trace actions. A review comment suggests optimizing the trace action iteration in the map_trace_state function to improve efficiency.