clients/stellarcore horizon: Obtain and expose diagnostic events in transaction endpoint #5148
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What
When submitting failing soroban transactions, Core may return a new
"diagnostic_events"
field with which to debug what happened.This PR exposes the new field in the Core client. Also, it adds a new extra
"diagnostic_events"
field in Horizon's transaction submission endpoint.Why
Improve debugability of failing soroban transactions. Also, it paves to way for exposing diagnostic events in soroban-RPC's
sendTransaction
endpoint.Known limitations
Core currently only supports this on nodes with diagnostic events explicitly enabled. @dmkozh is working on enabling the
"diagnostic_events"
field unconditionally.